startList = function() {
			if (document.all&&document.getElementById) { // Solo si es IE6
				navRoot = document.getElementById("ulMenuPrincipal");
				for (i=0; i<navRoot.childNodes.length; i++) {
					node = navRoot.childNodes[i];

					if (node.nodeName=="LI") {
							node.onmouseover=function() {
								this.className+=" over";
								

							 }
							 node.onmouseout=function() {
								 this.className=this.className.replace(" over", "");
	 					   }
				   	}
				  }
				 }
				}
window.onload=startList;// JavaScript Document