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   1  <attach event="ondocumentready" handler="parseStylesheets" />
   2  <script type="text/javascript">
   3  /**
   4   *    PSUEDOS - V1.21.041022 - hover & active
   5   *    ---------------------------------------------
   6   *    Peterned - http://www.xs4all.nl/~peterned/
   7   *    (c) 2004 - Peter Nederlof
   8   *
   9   *    Credits  - Arnoud Berendsen 
  10   *             - Martin Reurings
  11   *    for inspiring me and finding really sick bugs
  12   *
  13   *    howto: body { behavior:url("csshover.htc"); }
  14   *    ---------------------------------------------
  15   */
  16  
  17  var currentSheet, doc = window.document;
  18  var activators = {
  19      onhover:{on:'onmouseover', off:'onmouseout'},
  20      onactive:{on:'onmousedown', off:'onmouseup'}
  21  }
  22  
  23  function parseStylesheets() {
  24      var sheets = doc.styleSheets, l = sheets.length;
  25      for(var i=0; i<l; i++) 
  26          parseStylesheet(sheets[i]);
  27  }
  28      function parseStylesheet(sheet) {
  29          var l, rules, imports;
  30          if(sheet.imports) {
  31              imports = sheet.imports, l = imports.length;
  32              for(var i=0; i<l; i++) 
  33                  parseStylesheet(sheet.imports[i]);
  34          }
  35  
  36          rules = (currentSheet = sheet).rules, l = rules.length;
  37          for(var j=0; j<l; j++) parseCSSRule(rules[j]);
  38      }
  39  
  40      function parseCSSRule(rule) {
  41          var select = rule.selectorText, style = rule.style.cssText;
  42          if(!(/(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i).test(select) || !style) return;
  43          
  44          var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
  45          var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
  46          var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
  47          var affected = select.replace(/:hover.*$/, '');
  48          var elements = getElementsBySelect(affected);
  49  
  50          currentSheet.addRule(newSelect, style);
  51          for(var i=0; i<elements.length; i++)
  52              new HoverElement(elements[i], className, activators[pseudo]);
  53      }
  54  
  55  function HoverElement(node, className, events) {
  56      if(!node.hovers) node.hovers = {};
  57      if(node.hovers[className]) return;
  58      node.hovers[className] = true;
  59      node.attachEvent(events.on,
  60          function() { node.className += ' ' + className; });
  61      node.attachEvent(events.off,
  62          function() { node.className = 
  63              node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
  64  }
  65  
  66  function getElementsBySelect(rule) {
  67      var parts, nodes = [doc];
  68      parts = rule.split(' ');
  69      for(var i=0; i<parts.length; i++) {
  70          nodes = getSelectedNodes(parts[i], nodes);
  71      }    return nodes;
  72  }
  73      function getSelectedNodes(select, elements) {
  74          var result, node, nodes = [];
  75          var classname = (/\.([a-z0-9_-]+)/i).exec(select);
  76          var identify = (/\#([a-z0-9_-]+)/i).exec(select);
  77          var tagName = (/^[a-z0-9]+/i).exec(select.toUpperCase()) || '*';
  78          for(var i=0; i<elements.length; i++) {
  79              result = elements[i].getElementsByTagName(tagName);
  80              for(var j=0; j<result.length; j++) {
  81                  node = result[j];
  82                  if((identify && node.id != identify[1]) || (classname && !(new RegExp('\\b' +
  83                      classname[1] + '\\b').exec(node.className)))) continue;
  84                  nodes[nodes.length] = node;
  85              }
  86          }    return nodes;
  87      }
  88  </script>