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   1  <attach event="ondocumentready" handler="parseStylesheets" />
   2  <script type="text/javascript">
   3  /**
   4   *    Pseudos - V1.30.050121 - hover & active
   5   *    ---------------------------------------------
   6   *    Peterned - http://www.xs4all.nl/~peterned/
   7   *    (c) 2005 - Peter Nederlof
   8   *
   9   *    Credits  - Arnoud Berendsen 
  10   *             - Martin Reurings
  11   *           - Robert Hanson
  12   *
  13   *    howto: body { behavior:url("csshover.htc"); }
  14   *    ---------------------------------------------
  15   */
  16  
  17  var currentSheet, doc = window.document, activators = {
  18      onhover:{on:'onmouseover', off:'onmouseout'},
  19      onactive:{on:'onmousedown', off:'onmouseup'}
  20  }
  21  
  22  function parseStylesheets() {
  23      var sheets = doc.styleSheets, l = sheets.length;
  24      for(var i=0; i<l; i++) 
  25          parseStylesheet(sheets[i]);
  26  }
  27  	function parseStylesheet(sheet) {
  28          if(sheet.imports) {
  29              try {
  30                  var imports = sheet.imports, l = imports.length;
  31                  for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
  32              } catch(securityException){}
  33          }
  34  
  35          try {
  36              var rules = (currentSheet = sheet).rules, l = rules.length;
  37              for(var j=0; j<l; j++) parseCSSRule(rules[j]);
  38          } catch(securityException){}
  39      }
  40  
  41  	function parseCSSRule(rule) {
  42          var select = rule.selectorText, style = rule.style.cssText;
  43          if(!(/(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i).test(select) || !style) return;
  44          
  45          var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
  46          var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
  47          var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
  48          var affected = select.replace(/:hover.*$/, '');
  49          var elements = getElementsBySelect(affected);
  50  
  51          currentSheet.addRule(newSelect, style);
  52          for(var i=0; i<elements.length; i++)
  53              new HoverElement(elements[i], className, activators[pseudo]);
  54      }
  55  
  56  function HoverElement(node, className, events) {
  57      if(!node.hovers) node.hovers = {};
  58      if(node.hovers[className]) return;
  59      node.hovers[className] = true;
  60      node.attachEvent(events.on,
  61          function() { node.className += ' ' + className; });
  62      node.attachEvent(events.off,
  63          function() { node.className = 
  64              node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
  65  }
  66  
  67  function getElementsBySelect(rule) {
  68      var parts, nodes = [doc];
  69      parts = rule.split(' ');
  70      for(var i=0; i<parts.length; i++) {
  71          nodes = getSelectedNodes(parts[i], nodes);
  72      }    return nodes;
  73  }
  74  	function getSelectedNodes(select, elements) {
  75          var result, node, nodes = [];
  76          var classname = (/\.([a-z0-9_-]+)/i).exec(select);
  77          var identify = (/\#([a-z0-9_-]+)/i).exec(select);
  78          var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, '');
  79          for(var i=0; i<elements.length; i++) {
  80              result = tagName? elements[i].all.tags(tagName):elements[i].all; 
  81              for(var j=0; j<result.length; j++) {
  82                  node = result[j];
  83                  if((identify && node.id != identify[1]) || (classname && !(new RegExp('\\b' +
  84                      classname[1] + '\\b').exec(node.className)))) continue;
  85                  nodes[nodes.length] = node;
  86              }
  87          }    return nodes;
  88      }
  89  </script>