window.onload=function(){
	var box=document.getElementById('divselect'),
	    title=box.getElementsByTagName('cite')[0],
	    menu=box.getElementsByTagName('ul')[0],
	    as=box.getElementsByTagName('a'),
        index=-1;
   
    // 点击三角时
    title.onclick=function(event){
        event = event || window.event;
        if(event.stopPropagation){
            event.stopPropagation;
        }
        else{
            event.cancelBubble;
        }
        menu.style.display = "block";
      // 执行脚本
    }  
    
    for(var i=0;i<as.length;i++){
        as[i].onmouseover = function(){
            this.style.background = "#456";
        }
        as[i].onmouseout = function(){
            this.style.background = "#fff";
        }
        
        as[i].onclick = function(event){
            event = event || window.event;
            if(event.stopPropagation){
                event.stopPropagation;
            }
            else{
                event.cancelBubble;
            }
            menu.style.display = "none";
            title.innerHTML = this.innerHTML;
        }        
    }
   // 滑过滑过、离开、点击每个选项时
      // 执行脚本
    document.onclick = function(){
                menu.style.display = 'none';
            };
   // 点击页面空白处时
       // 执行脚本
 }