if (typeof($) == 'undefined') {
  $ = function(elem) {
    if (arguments.length > 1) {
      for (var i = 0, elems = [], length = arguments.length; i < length; i++)
        elems.push($(arguments[i]));
      return elems;
    }
    if (typeof elem == 'string') {
      return document.getElementById(elem);
    } else {
      return elem;
    }
  };
}
var drawShow=function(obj){
	obj.className="select";
	var obj=obj.getElementsByTagName("DIV")[0];
	if(obj) obj.style.display="block";
}
var drawHide=function(obj){
	obj.className="";
	var obj=obj.getElementsByTagName("DIV")[0];
	if(obj) obj.style.display="none";
}

var bindNavdraw=function(){
	navs=$("nav").getElementsByTagName("LI");
	var leng=navs.length;
	for(var i=0;i<leng;i++){
			if(navs[i].className=="tag"){
				navs[i].onmouseover=function(){drawShow(this)};
				navs[i].onmouseout=function(){drawHide(this)};
					
			}else{
				navs[i].onmouseover=function(){ this.className="select"}
				navs[i].onmouseout=function(){ this.className=""}
			}
			//navs[i].getElementsByTagName("A")[0].onclick=function(){return false;}
		}
}
window.onload=bindNavdraw;