startList = function() {
  if (document.all && document.getElementById) {
	navRoot = document.getElementById("navegacion");
	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