var showDetail=function(){
	var node=this;	
	if(showDetail.current){
	showDetail.current.className="";
	}
	showDetail.current=node;
	showDetail.current.className="current";
}

var regDetail=function(group){
	var items=group.getElementsByTagName("li");
	for( var i=0; i<items.length; i++){
		items[i].onmouseover=showDetail;
	}
	
	if(items.length){
		items[0].className="current";
		showDetail.current=items[0];
	}
}