(function($$) {
  
  .extend($$.fn, {
          // http://docs.jquery.com/Plugins/Validation/validate
  	validate: function( options ) {
  
                  // if nothing is selected, return nothing; can't chain anyway
                  if (!this.length) {
                          options && options.debug && window.console && console.warn( "nothing selected, can't validate, returning nothing" );
                          return;
                  }
  
                  // check if a validator for this form was already created
                  var validator = .data(this[0], 'validator');
                  if ( validator ) {
                          return validator;
                  }
  
                  validator = new $$.validator( options, this[0] );
                  .data(this[0], 'validator', validator);
  
                  if ( validator.settings.onsubmit ) {
  
                          // allow suppresing validation by adding a cancel class to the submit button
                          this.find("input, button").filter(".cancel").click(function() {
                                  validator.cancelSubmit = true;
                          });
  
                          // when a submitHandler is used, capture the submitting button
                          if (validator.settings.submitHandler) {
                                  this.find("input, button").filter(":submit").click(function() {
                                          validator.submitButton = this;
                                  });
                          }
  
                          // validate the form on submit
                          this.submit( function( event ) {
                                  if ( validator.settings.debug )
                                          // prevent form submit to be able to see console output
                                          event.preventDefault();
  
                                  function handle() {
                                          if ( validator.settings.submitHandler ) {
                                                  if (validator.submitButton) {
                                                          // insert a hidden input as a replacement for the missing submit button
                                                          var hidden = $("<input type='hidden'/>").attr("name", validator.submitButton.name).val(validator.submitButton.value).appendTo(validator.currentForm);
                                                  }
                                                  validator.settings.submitHandler.call( validator, validator.currentForm );
                                                  if (validator.submitButton) {
                                                          // and clean up afterwards; thanks to no-block-scope, hidden can be referenced
                                                          hidden.remove();
                                                  }
                                                  return false;
                                          }
                                          return true;
                                  }
  
                                  // prevent submit for invalid forms or custom submit handlers
                                  if ( validator.cancelSubmit ) {
                                          validator.cancelSubmit = false;
                                          return handle();
                                  }
                                  if ( validator.form() ) {
                                          if ( validator.pendingRequest ) {
                                                  validator.formSubmitted = true;
                                                  return false;
                                          }
                                          return handle();
                                  } else {
                                          validator.focusInvalid();
                                          return false;
                                  }
                          });
                  }
  
                  return validator;
          },
          // http://docs.jquery.com/Plugins/Validation/valid
  	valid: function() {
          if ( $(this[0]).is('form')) {
              return this.validate().form();
          } else {
              var valid = true;
              var validator = $(this[0].form).validate();
              this.each(function() {
                                  valid &= validator.element(this);
              });
              return valid;
          }
      },
          // attributes: space seperated list of attributes to retrieve and remove
          removeAttrs: function(attributes) {
                  var result = {},
                          $$element = this;
                  .each(attributes.split(/\s/), function(index, value) {
                          result[value] = $$element.attr(value);
                          element.removeAttr(value);
                  });
                  return result;
          },
          // http://docs.jquery.com/Plugins/Validation/rules
  	rules: function(command, argument) {
                  var element = this[0];
  
                  if (command) {
                          var settings = $$.data(element.form, 'validator').settings;
                          var staticRules = settings.rules;
                          var existingRules = .validator.staticRules(element);
                          switch(command) {
                          case "add":
                                  $$.extend(existingRules, .validator.normalizeRule(argument));
                                  staticRules[element.name] = existingRules;
                                  if (argument.messages)
                                          settings.messages[element.name] = $$.extend( settings.messages[element.name], argument.messages );
                                  break;
                          case "remove":
                                  if (!argument) {
                                          delete staticRules[element.name];
                                          return existingRules;
                                  }
                                  var filtered = {};
                                  .each(argument.split(/\s/), function(index, method) {
                                          filtered[method] = existingRules[method];
                                          delete existingRules[method];
                                  });
                                  return filtered;
                          }
                  }
  
                  var data = $$.validator.normalizeRules(
                  .extend(
                          {},
                          $$.validator.metadataRules(element),
                          .validator.classRules(element),
                          $$.validator.attributeRules(element),
                          .validator.staticRules(element)
                  ), element);
  
                  // make sure required is at front
                  if (data.required) {
                          var param = data.required;
                          delete data.required;
                          data = $$.extend({required: param}, data);
                  }
  
                  return data;
          }
  });
  
  // Custom selectors
  .extend($$.expr[":"], {
          // http://docs.jquery.com/Plugins/Validation/blank
  	blank: function(a) {return !.trim("" + a.value);},
          // http://docs.jquery.com/Plugins/Validation/filled
  	filled: function(a) {return !!$$.trim("" + a.value);},
          // http://docs.jquery.com/Plugins/Validation/unchecked
  	unchecked: function(a) {return !a.checked;}
  });
  
  // constructor for validator
  .validator = function( options, form ) {
          this.settings = $$.extend( true, {}, .validator.defaults, options );
          this.currentForm = form;
          this.init();
  };
  
  $$.validator.format = function(source, params) {
          if ( arguments.length == 1 )
                  return function() {
                          var args = .makeArray(arguments);
                          args.unshift(source);
                          return $$.validator.format.apply( this, args );
                  };
          if ( arguments.length > 2 && params.constructor != Array  ) {
                  params = .makeArray(arguments).slice(1);
          }
          if ( params.constructor != Array ) {
                  params = [ params ];
          }
          $$.each(params, function(i, n) {
                  source = source.replace(new RegExp("\\{" + i + "\\}", "g"), n);
          });
          return source;
  };
  
  .extend($$.validator, {
  
          defaults: {
                  messages: {},
                  groups: {},
                  rules: {},
                  errorClass: "error",
                  validClass: "valid",
                  errorElement: "label",
                  focusInvalid: true,
                  errorContainer: $( [] ),
                  errorLabelContainer: $( [] ),
                  onsubmit: true,
                  ignore: [],
                  ignoreTitle: false,
                  onfocusin: function(element) {
                          this.lastActive = element;
  
                          // hide error label and remove error class on focus if enabled
                          if ( this.settings.focusCleanup && !this.blockFocusCleanup ) {
                                  this.settings.unhighlight && this.settings.unhighlight.call( this, element, this.settings.errorClass, this.settings.validClass );
                                  this.addWrapper(this.errorsFor(element)).hide();
                          }
                  },
                  onfocusout: function(element) {
                          if ( !this.checkable(element) && (element.name in this.submitted || !this.optional(element)) ) {
                                  this.element(element);
                          }
                  },
                  onkeyup: function(element) {
                          if ( element.name in this.submitted || element == this.lastElement ) {
                                  this.element(element);
                          }
                  },
                  onclick: function(element) {
                          // click on selects, radiobuttons and checkboxes
                          if ( element.name in this.submitted )
                                  this.element(element);
                          // or option elements, check parent select in that case
                          else if (element.parentNode.name in this.submitted)
                                  this.element(element.parentNode);
                  },
                  highlight: function( element, errorClass, validClass ) {
                          element.addClass(errorClass).removeClass(validClass);
                  },
                  unhighlight: function( element, errorClass, validClass ) {
                          element.removeClass(errorClass).addClass(validClass);
                  }
          },
  
          // http://docs.jquery.com/Plugins/Validation/Validator/setDefaults
  	setDefaults: function(settings) {
                  .extend( $$.validator.defaults, settings );
          },
  
          messages: {
                  required: "This field is required.",
                  remote: "Please fix this field.",
                  email: "Please enter a valid email address.",
                  url: "Please enter a valid URL.",
                  date: "Please enter a valid date.",
                  dateISO: "Please enter a valid date (ISO).",
                  number: "Please enter a valid number.",
                  digits: "Please enter only digits.",
                  creditcard: "Please enter a valid credit card number.",
                  equalTo: "Please enter the same value again.",
                  accept: "Please enter a value with a valid extension.",
                  maxlength: .validator.format("Please enter no more than {0} characters."),
                  minlength: $$.validator.format("Please enter at least {0} characters."),
                  rangelength: .validator.format("Please enter a value between {0} and {1} characters long."),
                  range: $$.validator.format("Please enter a value between {0} and {1}."),
                  max: .validator.format("Please enter a value less than or equal to {0}."),
                  min: $$.validator.format("Please enter a value greater than or equal to {0}.")
          },
  
          autoCreateRanges: false,
  
          prototype: {
  
                  init: function() {
                          this.labelContainer = $(this.settings.errorLabelContainer);
                          this.errorContext = this.labelContainer.length && this.labelContainer || $(this.currentForm);
                          this.containers = $(this.settings.errorContainer).add( this.settings.errorLabelContainer );
                          this.submitted = {};
                          this.valueCache = {};
                          this.pendingRequest = 0;
                          this.pending = {};
                          this.invalid = {};
                          this.reset();
  
                          var groups = (this.groups = {});
                          .each(this.settings.groups, function(key, value) {
                                  $$.each(value.split(/\s/), function(index, name) {
                                          groups[name] = key;
                                  });
                          });
                          var rules = this.settings.rules;
                          .each(rules, function(key, value) {
                                  rules[key] = $$.validator.normalizeRule(value);
                          });
  
                          function delegate(event) {
                                  var validator = .data(this[0].form, "validator"),
                                          eventType = "on" + event.type.replace(/^validate/, "");
                                  validator.settings[eventType] && validator.settings[eventType].call(validator, this[0] );
                          }
                          $(this.currentForm)
                                  .validateDelegate(":text, :password, :file, select, textarea", "focusin focusout keyup", delegate)
                                  .validateDelegate(":radio, :checkbox, select, option", "click", delegate);
  
                          if (this.settings.invalidHandler)
                                  $(this.currentForm).bind("invalid-form.validate", this.settings.invalidHandler);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Validator/form
  		form: function() {
                          this.checkForm();
                          $$.extend(this.submitted, this.errorMap);
                          this.invalid = .extend({}, this.errorMap);
                          if (!this.valid())
                                  $(this.currentForm).triggerHandler("invalid-form", [this]);
                          this.showErrors();
                          return this.valid();
                  },
  
                  checkForm: function() {
                          this.prepareForm();
                          for ( var i = 0, elements = (this.currentElements = this.elements()); elements[i]; i++ ) {
                                  this.check( elements[i] );
                          }
                          return this.valid();
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Validator/element
  		element: function( element ) {
                          element = this.clean( element );
                          this.lastElement = element;
                          this.prepareElement( element );
                          this.currentElements = element;
                          var result = this.check( element );
                          if ( result ) {
                                  delete this.invalid[element.name];
                          } else {
                                  this.invalid[element.name] = true;
                          }
                          if ( !this.numberOfInvalids() ) {
                                  // Hide error containers on last error
                                  this.toHide = this.toHide.add( this.containers );
                          }
                          this.showErrors();
                          return result;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Validator/showErrors
  		showErrors: function(errors) {
                          if(errors) {
                                  // add items to error list and map
                                  $$.extend( this.errorMap, errors );
                                  this.errorList = [];
                                  for ( var name in errors ) {
                                          this.errorList.push({
                                                  message: errors[name],
                                                  element: this.findByName(name)[0]
                                          });
                                  }
                                  // remove items from success list
                                  this.successList = .grep( this.successList, function(element) {
                                          return !(element.name in errors);
                                  });
                          }
                          this.settings.showErrors
                                  ? this.settings.showErrors.call( this, this.errorMap, this.errorList )
                                  : this.defaultShowErrors();
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Validator/resetForm
  		resetForm: function() {
                          if ( $$.fn.resetForm )
                                  $( this.currentForm ).resetForm();
                          this.submitted = {};
                          this.prepareForm();
                          this.hideErrors();
                          this.elements().removeClass( this.settings.errorClass );
                  },
  
                  numberOfInvalids: function() {
                          return this.objectLength(this.invalid);
                  },
  
                  objectLength: function( obj ) {
                          var count = 0;
                          for ( var i in obj )
                                  count++;
                          return count;
                  },
  
                  hideErrors: function() {
                          this.addWrapper( this.toHide ).hide();
                  },
  
                  valid: function() {
                          return this.size() == 0;
                  },
  
                  size: function() {
                          return this.errorList.length;
                  },
  
                  focusInvalid: function() {
                          if( this.settings.focusInvalid ) {
                                  try {
                                          $(this.findLastActive() || this.errorList.length && this.errorList[0].element || [])
                                          .filter(":visible")
                                          .focus()
                                          // manually trigger focusin event; without it, focusin handler isn't called, findLastActive won't have anything to find
                                          .trigger("focusin");
                                  } catch(e) {
                                          // ignore IE throwing errors when focusing hidden elements
                                  }
                          }
                  },
  
                  findLastActive: function() {
                          var lastActive = this.lastActive;
                          return lastActive && .grep(this.errorList, function(n) {
                                  return n.element.name == lastActive.name;
                          }).length == 1 && lastActive;
                  },
  
                  elements: function() {
                          var validator = this,
                                  rulesCache = {};
  
                          // select all valid inputs inside the form (no submit or reset buttons)
                          // workaround $$Query([]).add until http://dev.jquery.com/ticket/2114 is solved
                          return $([]).add(this.currentForm.elements)
                          .filter(":input")
                          .not(":submit, :reset, :image, [disabled]")
                          .not( this.settings.ignore )
                          .filter(function() {
                                  !this.name && validator.settings.debug && window.console && console.error( "\%o has no name assigned", this);
  
                                  // select only the first element for each name, and only those with rules specified
                                  if ( this.name in rulesCache || !validator.objectLength(this.rules()) )
                                          return false;
  
                                  rulesCache[this.name] = true;
                                  return true;
                          });
                  },
  
                  clean: function( selector ) {
                          return $( selector )[0];
                  },
  
                  errors: function() {
                          return $( this.settings.errorElement + "." + this.settings.errorClass, this.errorContext );
                  },
  
                  reset: function() {
                          this.successList = [];
                          this.errorList = [];
                          this.errorMap = {};
                          this.toShow = $([]);
                          this.toHide = $([]);
                          this.currentElements = $([]);
                  },
  
                  prepareForm: function() {
                          this.reset();
                          this.toHide = this.errors().add( this.containers );
                  },
  
                  prepareElement: function( element ) {
                          this.reset();
                          this.toHide = this.errorsFor(element);
                  },
  
                  check: function( element ) {
                          element = this.clean( element );
  
                          // if radio/checkbox, validate first element in group instead
                          if (this.checkable(element)) {
                                  element = this.findByName( element.name ).not(this.settings.ignore)[0];
                          }
  
                          var rules = element.rules();
                          var dependencyMismatch = false;
                          for (var method in rules ) {
                                  var rule = { method: method, parameters: rules[method] };
                                  try {
                                          var result = .validator.methods[method].call( this, element.value.replace(/\r/g, ""), element, rule.parameters );
  
                                          // if a method indicates that the field is optional and therefore valid,
                                          // don't mark it as valid when there are no other rules
                                          if ( result == "dependency-mismatch" ) {
                                                  dependencyMismatch = true;
                                                  continue;
                                          }
                                          dependencyMismatch = false;
  
                                          if ( result == "pending" ) {
                                                  this.toHide = this.toHide.not( this.errorsFor(element) );
                                                  return;
                                          }
  
                                          if( !result ) {
                                                  this.formatAndAdd( element, rule );
                                                  return false;
                                          }
                                  } catch(e) {
                                          this.settings.debug && window.console && console.log("exception occured when checking element " + element.id
                                                   + ", check the '" + rule.method + "' method", e);
                                          throw e;
                                  }
                          }
                          if (dependencyMismatch)
                                  return;
                          if ( this.objectLength(rules) )
                                  this.successList.push(element);
                          return true;
                  },
  
                  // return the custom message for the given element and validation method
                  // specified in the element's "messages" metadata
                  customMetaMessage: function(element, method) {
                          if (!$$.metadata)
                                  return;
  
                          var meta = this.settings.meta
                                  ? element.metadata()[this.settings.meta]
                                  : element.metadata();
  
                          return meta && meta.messages && meta.messages[method];
                  },
  
                  // return the custom message for the given element name and validation method
                  customMessage: function( name, method ) {
                          var m = this.settings.messages[name];
                          return m && (m.constructor == String
                                  ? m
                                  : m[method]);
                  },
  
                  // return the first defined argument, allowing empty strings
                  findDefined: function() {
                          for(var i = 0; i < arguments.length; i++) {
                                  if (arguments[i] !== undefined)
                                          return arguments[i];
                          }
                          return undefined;
                  },
  
                  defaultMessage: function( element, method) {
                          return this.findDefined(
                                  this.customMessage( element.name, method ),
                                  this.customMetaMessage( element, method ),
                                  // title is never undefined, so handle empty string as undefined
                                  !this.settings.ignoreTitle && element.title || undefined,
                                  .validator.messages[method],
                                  "<strong>Warning: No message defined for " + element.name + "</strong>"
                          );
                  },
  
                  formatAndAdd: function( element, rule ) {
                          var message = this.defaultMessage( element, rule.method ),
                                  theregex = /$?\{(\d+)\}/g;
                          if ( typeof message == "function" ) {
                                  message = message.call(this, rule.parameters, element);
                          } else if (theregex.test(message)) {
                                  message = jQuery.format(message.replace(theregex, '{$1}'), rule.parameters);
                          }
                          this.errorList.push({
                                  message: message,
                                  element: element
                          });
  
                          this.errorMap[element.name] = message;
                          this.submitted[element.name] = message;
                  },
  
                  addWrapper: function(toToggle) {
                          if ( this.settings.wrapper )
                                  toToggle = toToggle.add( toToggle.parent( this.settings.wrapper ) );
                          return toToggle;
                  },
  
                  defaultShowErrors: function() {
                          for ( var i = 0; this.errorList[i]; i++ ) {
                                  var error = this.errorList[i];
                                  this.settings.highlight && this.settings.highlight.call( this, error.element, this.settings.errorClass, this.settings.validClass );
                                  this.showLabel( error.element, error.message );
                          }
                          if( this.errorList.length ) {
                                  this.toShow = this.toShow.add( this.containers );
                          }
                          if (this.settings.success) {
                                  for ( var i = 0; this.successList[i]; i++ ) {
                                          this.showLabel( this.successList[i] );
                                  }
                          }
                          if (this.settings.unhighlight) {
                                  for ( var i = 0, elements = this.validElements(); elements[i]; i++ ) {
                                          this.settings.unhighlight.call( this, elements[i], this.settings.errorClass, this.settings.validClass );
                                  }
                          }
                          this.toHide = this.toHide.not( this.toShow );
                          this.hideErrors();
                          this.addWrapper( this.toShow ).show();
                  },
  
                  validElements: function() {
                          return this.currentElements.not(this.invalidElements());
                  },
  
                  invalidElements: function() {
                          return $(this.errorList).map(function() {
                                  return this.element;
                          });
                  },
  
                  showLabel: function(element, message) {
                          var label = this.errorsFor( element );
                          if ( label.length ) {
                                  // refresh error/success class
                                  label.removeClass().addClass( this.settings.errorClass );
  
                                  // check if we have a generated label, replace the message then
                                  label.attr("generated") && label.html(message);
                          } else {
                                  // create label
                                  label = $("<" + this.settings.errorElement + "/>")
                                          .attr({"for":  this.idOrName(element), generated: true})
                                          .addClass(this.settings.errorClass)
                                          .html(message || "");
                                  if ( this.settings.wrapper ) {
                                          // make sure the element is visible, even in IE
                                          // actually showing the wrapped element is handled elsewhere
                                          label = label.hide().show().wrap("<" + this.settings.wrapper + "/>").parent();
                                  }
                                  if ( !this.labelContainer.append(label).length )
                                          this.settings.errorPlacement
                                                  ? this.settings.errorPlacement(label, element )
                                                  : label.insertAfter(element);
                          }
                          if ( !message && this.settings.success ) {
                                  label.text("");
                                  typeof this.settings.success == "string"
                                          ? label.addClass( this.settings.success )
                                          : this.settings.success( label );
                          }
                          this.toShow = this.toShow.add(label);
                  },
  
                  errorsFor: function(element) {
                          var name = this.idOrName(element);
                      return this.errors().filter(function() {
                                  return this.attr('for') == name;
                          });
                  },
  
                  idOrName: function(element) {
                          return this.groups[element.name] || (this.checkable(element) ? element.name : element.id || element.name);
                  },
  
                  checkable: function( element ) {
                          return /radio|checkbox/i.test(element.type);
                  },
  
                  findByName: function( name ) {
                          // select by name and filter by form for performance over form.find("[name=...]")
                          var form = this.currentForm;
                          return $(document.getElementsByName(name)).map(function(index, element) {
                                  return element.form == form && element.name == name && element  || null;
                          });
                  },
  
                  getLength: function(value, element) {
                          switch( element.nodeName.toLowerCase() ) {
                          case 'select':
                                  return $("option:selected", element).length;
                          case 'input':
                                  if( this.checkable( element) )
                                          return this.findByName(element.name).filter(':checked').length;
                          }
                          return value.length;
                  },
  
                  depend: function(param, element) {
                          return this.dependTypes[typeof param]
                                  ? this.dependTypes[typeof param](param, element)
                                  : true;
                  },
  
                  dependTypes: {
                          "boolean": function(param, element) {
                                  return param;
                          },
                          "string": function(param, element) {
                                  return !!$(param, element.form).length;
                          },
                          "function": function(param, element) {
                                  return param(element);
                          }
                  },
  
                  optional: function(element) {
                          return !$$.validator.methods.required.call(this, .trim(element.value), element) && "dependency-mismatch";
                  },
  
                  startRequest: function(element) {
                          if (!this.pending[element.name]) {
                                  this.pendingRequest++;
                                  this.pending[element.name] = true;
                          }
                  },
  
                  stopRequest: function(element, valid) {
                          this.pendingRequest--;
                          // sometimes synchronization fails, make sure pendingRequest is never < 0
                          if (this.pendingRequest < 0)
                                  this.pendingRequest = 0;
                          delete this.pending[element.name];
                          if ( valid && this.pendingRequest == 0 && this.formSubmitted && this.form() ) {
                                  $(this.currentForm).submit();
                                  this.formSubmitted = false;
                          } else if (!valid && this.pendingRequest == 0 && this.formSubmitted) {
                                  $(this.currentForm).triggerHandler("invalid-form", [this]);
                                  this.formSubmitted = false;
                          }
                  },
  
                  previousValue: function(element) {
                          return $$.data(element, "previousValue") || .data(element, "previousValue", {
                                  old: null,
                                  valid: true,
                                  message: this.defaultMessage( element, "remote" )
                          });
                  }
  
          },
  
          classRuleSettings: {
                  required: {required: true},
                  email: {email: true},
                  url: {url: true},
                  date: {date: true},
                  dateISO: {dateISO: true},
                  dateDE: {dateDE: true},
                  number: {number: true},
                  numberDE: {numberDE: true},
                  digits: {digits: true},
                  creditcard: {creditcard: true}
          },
  
          addClassRules: function(className, rules) {
                  className.constructor == String ?
                          this.classRuleSettings[className] = rules :
                          $$.extend(this.classRuleSettings, className);
          },
  
          classRules: function(element) {
                  var rules = {};
                  var classes = element.attr('class');
                  classes && .each(classes.split(' '), function() {
                          if (this in $$.validator.classRuleSettings) {
                                  .extend(rules, $$.validator.classRuleSettings[this]);
                          }
                  });
                  return rules;
          },
  
          attributeRules: function(element) {
                  var rules = {};
                  var element = element;
  
                  for (var method in $$.validator.methods) {
                          var value = element.attr(method);
                          if (value) {
                                  rules[method] = value;
                          }
                  }
  
                  // maxlength may be returned as -1, 2147483647 (IE) and 524288 (safari) for text inputs
                  if (rules.maxlength && /-1|2147483647|524288/.test(rules.maxlength)) {
                          delete rules.maxlength;
                  }
  
                  return rules;
          },
  
          metadataRules: function(element) {
                  if (!$$.metadata) return {};
  
                  var meta = .data(element.form, 'validator').settings.meta;
                  return meta ?
                          element.metadata()[meta] :
                          element.metadata();
          },
  
          staticRules: function(element) {
                  var rules = {};
                  var validator = $$.data(element.form, 'validator');
                  if (validator.settings.rules) {
                          rules = .validator.normalizeRule(validator.settings.rules[element.name]) || {};
                  }
                  return rules;
          },
  
          normalizeRules: function(rules, element) {
                  // handle dependency check
                  $$.each(rules, function(prop, val) {
                          // ignore rule when param is explicitly false, eg. required:false
                          if (val === false) {
                                  delete rules[prop];
                                  return;
                          }
                          if (val.param || val.depends) {
                                  var keepRule = true;
                                  switch (typeof val.depends) {
                                          case "string":
                                                  keepRule = !!$(val.depends, element.form).length;
                                                  break;
                                          case "function":
                                                  keepRule = val.depends.call(element, element);
                                                  break;
                                  }
                                  if (keepRule) {
                                          rules[prop] = val.param !== undefined ? val.param : true;
                                  } else {
                                          delete rules[prop];
                                  }
                          }
                  });
  
                  // evaluate parameters
                  .each(rules, function(rule, parameter) {
                          rules[rule] = $$.isFunction(parameter) ? parameter(element) : parameter;
                  });
  
                  // clean number parameters
                  .each(['minlength', 'maxlength', 'min', 'max'], function() {
                          if (rules[this]) {
                                  rules[this] = Number(rules[this]);
                          }
                  });
                  $$.each(['rangelength', 'range'], function() {
                          if (rules[this]) {
                                  rules[this] = [Number(rules[this][0]), Number(rules[this][1])];
                          }
                  });
  
                  if (.validator.autoCreateRanges) {
                          // auto-create ranges
                          if (rules.min && rules.max) {
                                  rules.range = [rules.min, rules.max];
                                  delete rules.min;
                                  delete rules.max;
                          }
                          if (rules.minlength && rules.maxlength) {
                                  rules.rangelength = [rules.minlength, rules.maxlength];
                                  delete rules.minlength;
                                  delete rules.maxlength;
                          }
                  }
  
                  // To support custom messages in metadata ignore rule methods titled "messages"
                  if (rules.messages) {
                          delete rules.messages;
                  }
  
                  return rules;
          },
  
          // Converts a simple string to a {string: true} rule, e.g., "required" to {required:true}
          normalizeRule: function(data) {
                  if( typeof data == "string" ) {
                          var transformed = {};
                          $$.each(data.split(/\s/), function() {
                                  transformed[this] = true;
                          });
                          data = transformed;
                  }
                  return data;
          },
  
          // http://docs.jquery.com/Plugins/Validation/Validator/addMethod
  	addMethod: function(name, method, message) {
                  .validator.methods[name] = method;
                  $$.validator.messages[name] = message != undefined ? message : .validator.messages[name];
                  if (method.length < 3) {
                          $$.validator.addClassRules(name, .validator.normalizeRule(name));
                  }
          },
  
          methods: {
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/required
  		required: function(value, element, param) {
                          // check if dependency is met
                          if ( !this.depend(param, element) )
                                  return "dependency-mismatch";
                          switch( element.nodeName.toLowerCase() ) {
                          case 'select':
                                  // could be an array for select-multiple or a string, both are fine this way
                                  var val = element.val();
                                  return val && val.length > 0;
                          case 'input':
                                  if ( this.checkable(element) )
                                          return this.getLength(value, element) > 0;
                          default:
                                  return $$.trim(value).length > 0;
                          }
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/remote
  		remote: function(value, element, param) {
                          if ( this.optional(element) )
                                  return "dependency-mismatch";
  
                          var previous = this.previousValue(element);
                          if (!this.settings.messages[element.name] )
                                  this.settings.messages[element.name] = {};
                          previous.originalMessage = this.settings.messages[element.name].remote;
                          this.settings.messages[element.name].remote = previous.message;
  
                          param = typeof param == "string" && {url:param} || param;
  
                          if ( this.pending[element.name] ) {
                                  return "pending";
                          }
                          if ( previous.old === value ) {
                                  return previous.valid;
                          }
  
                          previous.old = value;
                          var validator = this;
                          this.startRequest(element);
                          var data = {};
                          data[element.name] = value;
                          .ajax($$.extend(true, {
                                  url: param,
                                  mode: "abort",
                                  port: "validate" + element.name,
                                  dataType: "json",
                                  data: data,
                                  success: function(response) {
                                          validator.settings.messages[element.name].remote = previous.originalMessage;
                                          var valid = response === true;
                                          if ( valid ) {
                                                  var submitted = validator.formSubmitted;
                                                  validator.prepareElement(element);
                                                  validator.formSubmitted = submitted;
                                                  validator.successList.push(element);
                                                  validator.showErrors();
                                          } else {
                                                  var errors = {};
                                                  var message = response || validator.defaultMessage( element, "remote" );
                                                  errors[element.name] = previous.message = .isFunction(message) ? message(value) : message;
                                                  validator.showErrors(errors);
                                          }
                                          previous.valid = valid;
                                          validator.stopRequest(element, valid);
                                  }
                          }, param));
                          return "pending";
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/minlength
  		minlength: function(value, element, param) {
                          return this.optional(element) || this.getLength($$.trim(value), element) >= param;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/maxlength
  		maxlength: function(value, element, param) {
                          return this.optional(element) || this.getLength(.trim(value), element) <= param;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/rangelength
  		rangelength: function(value, element, param) {
                          var length = this.getLength($$.trim(value), element);
                          return this.optional(element) || ( length >= param[0] && length <= param[1] );
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/min
  		min: function( value, element, param ) {
                          return this.optional(element) || value >= param;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/max
  		max: function( value, element, param ) {
                          return this.optional(element) || value <= param;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/range
  		range: function( value, element, param ) {
                          return this.optional(element) || ( value >= param[0] && value <= param[1] );
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/email
  		email: function(value, element) {
                          // contributed by Scott Gonzalez: http://projects.scottsplayground.com/email_address_validation/
  			return this.optional(element) || /^((([a-z]|\d|[!#$%&'\*\+\-\/=\?^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#$%&'\*\+\-\/=\?^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?/i.test(value);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/url
  		url: function(value, element) {
                          // contributed by Scott Gonzalez: http://projects.scottsplayground.com/iri/
  			return this.optional(element) || /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$$/i.test(value);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/date
  		date: function(value, element) {
                          return this.optional(element) || !/Invalid|NaN/.test(new Date(value));
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/dateISO
  		dateISO: function(value, element) {
                          return this.optional(element) || /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}/.test(value);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/number
  		number: function(value, element) {
                          return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$$/.test(value);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/digits
  		digits: function(value, element) {
                          return this.optional(element) || /^\d+/.test(value);
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/creditcard
  		// based on http://en.wikipedia.org/wiki/Luhn
  		creditcard: function(value, element) {
                          if ( this.optional(element) )
                                  return "dependency-mismatch";
                          // accept only digits and dashes
                          if (/[^0-9-]+/.test(value))
                                  return false;
                          var nCheck = 0,
                                  nDigit = 0,
                                  bEven = false;
  
                          value = value.replace(/\D/g, "");
  
                          for (var n = value.length - 1; n >= 0; n--) {
                                  var cDigit = value.charAt(n);
                                  var nDigit = parseInt(cDigit, 10);
                                  if (bEven) {
                                          if ((nDigit *= 2) > 9)
                                                  nDigit -= 9;
                                  }
                                  nCheck += nDigit;
                                  bEven = !bEven;
                          }
  
                          return (nCheck % 10) == 0;
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/accept
  		accept: function(value, element, param) {
                          param = typeof param == "string" ? param.replace(/,/g, '|') : "png|jpe?g|gif";
                          return this.optional(element) || value.match(new RegExp(".(" + param + ")$$", "i"));
                  },
  
                  // http://docs.jquery.com/Plugins/Validation/Methods/equalTo
  		equalTo: function(value, element, param) {
                          // bind to the blur event of the target in order to revalidate whenever the target field is updated
                          // TODO find a way to bind the event just once, avoiding the unbind-rebind overhead
                          var target = param.unbind(".validate-equalTo").bind("blur.validate-equalTo", function() {
                                  element.valid();
                          });
                          return value == target.val();
                  }
  
          }
  
  });
  
  // deprecated, use .validator.format instead
  $$.format = .validator.format;
  
  })(jQuery);
  
  // ajax mode: abort
  // usage: $$.ajax({ mode: "abort"[, port: "uniqueport"]});
  // if mode:"abort" is used, the previous request on that port (port can be undefined) is aborted via XMLHttpRequest.abort()
  ;(function() {
          var pendingRequests = {};
          // Use a prefilter if available (1.5+)
          if ( $$.ajaxPrefilter ) {
                  .ajaxPrefilter(function(settings, _, xhr) {
                          var port = settings.port;
                          if (settings.mode == "abort") {
                                  if ( pendingRequests[port] ) {
                                          pendingRequests[port].abort();
                                  }
                                  pendingRequests[port] = xhr;
                          }
                  });
          } else {
                  // Proxy ajax
                  var ajax = $$.ajax;
                  .ajax = function(settings) {
                          var mode = ( "mode" in settings ? settings : $$.ajaxSettings ).mode,
                                  port = ( "port" in settings ? settings : .ajaxSettings ).port;
                          if (mode == "abort") {
                                  if ( pendingRequests[port] ) {
                                          pendingRequests[port].abort();
                                  }
                                  return (pendingRequests[port] = ajax.apply(this, arguments));
                          }
                          return ajax.apply(this, arguments);
                  };
          }
  })(jQuery);
  
  // provides cross-browser focusin and focusout events
  // IE has native support, in other browsers, use event caputuring (neither bubbles)
  
  // provides delegate(type: String, delegate: Selector, handler: Callback) plugin for easier event delegation
  // handler is only called when $(event.target).is(delegate), in the scope of the jquery-object for event.target
  ;(function($$) {
          // only implement if not provided by jQuery core (since 1.4)
          // TODO verify if jQuery 1.4's implementation is compatible with older jQuery special-event APIs
          if (!jQuery.event.special.focusin && !jQuery.event.special.focusout && document.addEventListener) {
                  .each({
                          focus: 'focusin',
                          blur: 'focusout'
                  }, function( original, fix ){
                          $$.event.special[fix] = {
                                  setup:function() {
                                          this.addEventListener( original, handler, true );
                                  },
                                  teardown:function() {
                                          this.removeEventListener( original, handler, true );
                                  },
                                  handler: function(e) {
                                          arguments[0] = .event.fix(e);
                                          arguments[0].type = fix;
                                          return $$.event.handle.apply(this, arguments);
                                  }
                          };
                          function handler(e) {
                                  e = .event.fix(e);
                                  e.type = fix;
                                  return $$.event.handle.call(this, e);
                          }
                  });
          };
          .extend($$.fn, {
                  validateDelegate: function(delegate, type, handler) {
                          return this.bind(type, function(event) {
                                  var target = $(event.target);
                                  if (target.is(delegate)) {
                                          return handler.apply(target, arguments);
                                  }
                          });
                  }
          });
  })(jQuery);