// Get a style property (name) of a specific element (elem)
  function getStyle( elem, name ) {
      // If the property exists in style[], then it’s been set recently (and is current)
      if (elem.style[name])
          return elem.style[name];
  
      // Otherwise, try to use IE’s method
      else if (elem.currentStyle)
          return elem.currentStyle[name];
  
      // Or the W3C’s method, if it exists
      else if (document.defaultView && document.defaultView.getComputedStyle) {
          // It uses the traditional ‘text-align’ style of rule writing, instead of textAlign
          name = name.replace(/([A-Z])/g,"-$1");
          name = name.toLowerCase();
  
          // Get the style object and get the value of the property (if it exists)
          var s = document.defaultView.getComputedStyle(elem,"");
          return s && s.getPropertyValue(name);
  
      // Otherwise, we’re using some other browser
      } else
          return null;
  }