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<title>竖型导航菜单演示</title>
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ul{list-style: none;padding-left: 200px;height: 50px;border-bottom: 5px solid #F60;}
ul li{float: left;margin-top: 20px;}
a{display: block;text-decoration: none;height: 30px;line-height: 30px;width: 120px;background-color: #ccc;margin-bottom: 1px;text-align: center;border-radius: 10px 10px 0 0;}
a:hover{background-color: #f60;color: #fff;margin-top: -10px;line-height: 40px;height: 40px;}
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window.onload = function(){
var aA = document.getElementsByTagName("a");
for (var i = 0; i <aA.length; i++) {
aA[i].onmouseover=function() {
clearInterval(this.time);
var This = this;
This.time = setInterval(function(){
This.style.width = This.offsetWidth+8+"px";
if (This.offsetWidth>=160) {
clearInterval(This.time);
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},30);
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var This = this;
This.time = setInterval(function(){
This.style.width = This.offsetWidth-8+"px";
if (This.offsetWidth<=120) {
This.style.width="120px";
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},30);
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