/* codigo para el menu horizontal desplegable */

startList = function() {

if (document.all && document.getElementById) {
  navRoot = document.getElementById("nav");   
  for (i=0; i<navRoot.childNodes.length; i++) {
	node = navRoot.childNodes[i];
	if (node.nodeName=="LI") {
		// alert(node);
	  node.onmouseover=function() {
		this.className+=" over";				
		//document.getElementById('last_news').style.zIndex =-1;
	  }
	  node.onmouseout=function() {
		this.className=this.className.replace(" over", "");
		//document.getElementById('last_news').style.zIndex =0;
	  }
	}
  }
}
}
window.onload=startList;