submenu = funtion(){
	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"){
		  node.onmouseover = function(){
			this.className+=" over";

		  }
		  node.onmouseout=function(){
		    this.className=this.className.replace(" over", "");
		  }
		}
	
	  }
	}
}

window.onload=submenu;