function dynamic_navigation ( urlString ) {
        var tokens = urlString.split("=");
        var url = tokens[1];
        var id = tokens[0];
        YAHOO.plugin.Dispatcher.fetch ( "container", url, {
            onLoad: function (el) {
                YAHOO.widget.AccordionManager.open(id);
            }
        });
    };

    var handleNavigation = function (layer, args) {
      var e = args[0], el = args[1].anchor;
      var c = el.getAttribute("class");

      // Return if event is not on left navigation.
      if(c && c.indexOf('lnav') == -1) return;

      // If event is on anchor tag execute the following.
      if (!args[1].decrepitate && el) {
    	  var h = el.getAttribute("href",2),
    	  	  r = el.getAttribute("rel"),
    	  	  t = el.getAttribute("target"),
    		  l = new String(document.location);
      	  // checking if the href is not the current page or a jump anchor or a javascript function
      	  // checking if the rel or target attribute are defined...
    	  if ((h && ((h.indexOf('#') === 0) || (h.indexOf('javascript:') === 0)
              || ((h.indexOf('#') > 0) && (l.indexOf(h) === 0)))) ||
    	          (r == 'external') || (r == 'internal') || (t && t != '') || (h == '')) {
    		  // do nothing
          } else {
        	  // Call interception and stop event from bubbling.
        	  dynamic_navigation (h);
              args[1].decrepitate = true;
              args[1].stop = true;
          }
      }
    };

    YAHOO.Bubbling.addDefaultAction('lnav', handleNavigation);