<!doctype html><html><head> <meta charset="UTF-8"> <title>下拉菜单</title> <style type="text/css">body,ul,li{ margin:0; padding:0; font-size:13px;}ul,li{list-style:none;}#divselect{width:186px; margin:80px auto; position:relative; z-index:10000;}#divselect cite{width:150px; height:24px;line-height:24px; display:block; color:#807a62; cursor:pointer;font-style:normal;padding-left:4px; padding-right:30px; border:1px solid #333333; background:url(xjt.png) no-repeat right center;}#divselect ul{width:184px;border:1px solid #333333; background-color:#ffffff; position:absolute; z-index:20000; margin-top:-1px; display:none;}#divselect ul li{height:24px; line-height:24px;}#divselect ul li a{display:block; height:24px; color:#333333; text-decoration:none; padding-left:10px; padding-right:10px;} </style> <script type="text/javascript">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(e){ // 执行脚本 e = e || window.event; menu.style.display = 'block'; if(e.Propagation){ e.propagation(); }else{ e.cancleBubble = true; } } document.onkeyup = function(e){ e = e || window.event; if(e.keyCode == 40){//向下 index++; if(index>=as.length){ index = 0; } changeB(); } if(e.keyCode == 38){//向上 if(index<=0){ index = as.length-1; } index--; changeB(); } if(e.keyCode == 13){ title.innerHTML = as[index].innerHTML; for(var i=0;i<as.length;i++){ as[i].style.background = 'none'; } index = -1; menu.style.display = 'none'; } } // 滑过滑过、离开、点击每个选项时 // 执行脚本 for(var i=0;i<as.length;i++){ as[i].onmouseover = function(){ this.style.background = 'grey'; } as[i].onmouseout = function(){ this.style.background = 'none'; } as[i].onclick = function(e){ e = e || window.event; if(e.Propagation){ e.propagation(); }else{ e.cancleBubble = true; } menu.style.display = 'none'; title.innerHTML = this.innerHTML; } } function changeB(){ for(var i=0;i<as.length;i++){ as[i].style.background = 'none'; } as[index].style.background = 'grey'; } document.onclick = function(){ menu.show.display = 'none'; } } </script></head><body> <div id="divselect"> <cite>请选择分类</cite> <ul> <li id="li"><a href="javascript:;" selectid="1">ASP开发</a></li> <li><a href="javascript:;" selectid="2">.NET开发</a></li> <li><a href="javascript:;" selectid="3">PHP开发</a></li> <li><a href="javascript:;" selectid="4">Javascript开发</a></li> <li><a href="javascript:;" selectid="5">Java特效</a></li> </ul> </div></body></html>
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