startList = function() {
	
	if (document.all&&document.getElementById) {
		navRoot = document.getElementById("raiz_menu_principal");
		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", "");
				}
			}
		}
	}
}

/*Effect.switchUpDown = function(element){
    if(Element.visible(element)==false){
		Effect.SlideDown(element);
	}
	else{
		Effect.SlideUp(element);
	}
}*/

document.observe('dom:loaded',function(){
	startList();
});