(function NTES_Nav(){
            var select_area = $_G("select_area1"), selected = $_G("selected1"), select_main = $_G("select_main1"), select_list = select_main.getElementsByTagName("a"), len = select_list.length;
		    for (var i = 0; i < len; i++) {
                select_list[i].onclick = clickselect;
                select_list[i].onmouseover = a_mouseover;
                select_list[i].onmouseout = a_mouseout;
            }
            select_area.onclick = select_main.onmouseover = function(){
                select_main.style.display = "block";
            }
            select_main.onmouseout = function(){
                select_main.style.display = "none";
            }
			//鼠标移上函数
			 function a_mouseover () {
                this.className = "active";
            }
			//鼠标移开函数
            function a_mouseout () {
                this.className = "";
            }
			//取html元素
			function $_G(id){
                return document.getElementById(id);
            }
			//选择值函数
            function clickselect(e){
                e = e || window.event;
                e.cancelBubble = true;
                var name = this.innerHTML;
                var txt = document.createTextNode(name);
                selected.removeChild(selected.firstChild);
                selected.appendChild(txt);
                select_main.style.display = "none";
                var title = this.getAttribute("title");
               // alert("选择框的值="+title);
            }
        })();