/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Tanya Puntti | http://www.hypergurl.com */
<!--
// ==========================================================================
// JavaScript Tool for making Digg buttons
// Copyright (C) 2007 Hypergurl
//
// Website: http://www.hypergurl.com/digg-generator.html
// Webmasters can download the script to use on their own sites
// as long as all comments and links back to http://www.hypergurl.com remain.
// ==========================================================================

// Set variables for reserved and unreserved characters allowed in text boxes

var unreserved = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_.~";
var reserved = "!*'();:@&=+$,/?%#[]";
var allowed = unreserved + reserved;
var hexchars = "0123456789ABCDEFabcdef";

// --------------------------------- Encoding -------------------------------

// This function returns a percent sign followed by two hexadecimal digits.
// Input is a decimal value not greater than 255.
function gethex(decimal) 
{
  return "%" + hexchars.charAt(decimal >> 4) + hexchars.charAt(decimal & 0xF);
}

// Encode function

function encode() 
{
  // Clear output field:
  document.converter.urlencoded.value = "";

  // Some variables for website address
  var url = document.converter.url.value;
  var urlencoded = "";

  // Some variables for title
  var title = document.converter.title.value;
  var titleencoded = "";

  // Some variables for description
  var description = document.converter.description.value;
  var descriptionencoded = "";

  // Some variables for Topic
  var topic = document.converter.topic.value;

    // non-ASCII characters will not be encoded:
    var notascii = "";

    // encode website address
	for (var i = 0; i < url.length; i++ ) {
      var ch = url.charAt(i);
      // Check if character is an unreserved character:
      if (unreserved.indexOf(ch) != -1) {
        urlencoded = urlencoded + ch;
      } else {
        // If position in the Unicode table is smaller than 128, then we have
        // an ASCII character:
        var charcode = url.charCodeAt(i);
        if (charcode < 128) {
          urlencoded = urlencoded + gethex(charcode);
        } else {
          urlencoded = urlencoded + ch;
          notascii = notascii + ch + " ";
        }
      
    }

	}

// encode title
	for (var j = 0; j < title.length; j++ ) 
	{
      var ch = title.charAt(j);
      // Check if character is an unreserved character:
      if (unreserved.indexOf(ch) != -1)
	  {
        titleencoded = titleencoded + ch;
      } 
	  else 
	  {
        // If position in the Unicode table is smaller than 128, then we have
        // an ASCII character:
        var charcode = title.charCodeAt(j);
        if (charcode < 128)
		{
          titleencoded = titleencoded + gethex(charcode);
        } 
		else 
		{
          titleencoded = titleencoded + ch;
          notascii = notascii + ch + " ";
		}
     }
	 }

	 // encode description
	for (var x = 0; x < description.length; x++ ) 
	{
      var ch = description.charAt(x);
      // Check if character is an unreserved character:
      if (unreserved.indexOf(ch) != -1)
	  {
        descriptionencoded = descriptionencoded + ch;
      } 
	  else 
	  {
        // If position in the Unicode table is smaller than 128, then we have
        // an ASCII character:
        var charcode = description.charCodeAt(x);
        if (charcode < 128)
		{
          descriptionencoded = descriptionencoded + gethex(charcode);
        } 
		else 
		{
          descriptionencoded = descriptionencoded + ch;
          notascii = notascii + ch + " ";
		}
     }
	 }

  // Write result to lower form box
    document.converter.urlencoded.value = "http://digg.com/submit?phase=2&url=" + urlencoded + "&title=" + titleencoded + "&bodytext=" + descriptionencoded + "&topic=" + topic;

    // Display warning message if necessary
    if (notascii != "") alert("Warning: Non-ASCII characters in text!\n\nThus, these characters have not been encoded:\n" + notascii);
}