切换特效核心代码：
js代码：
<script type="text/javascript">
function setTab(name,cursel,n) {
for (i = 1; i <= n; i++) {
var menu = document.getElementById(name + i);
var con = document.getElementById("con_" + name + "_" + i);
menu.className = i == cursel ? "hover" : "";
con.style.display = i == cursel ? "block" : "none";
}
}
</script>
网页代码：
<li id="five1" onmouseover="setTab('five',1,2)" >选项卡1</li>
<li id="five2" onmouseover="setTab('five',2,3)" >选项卡2</li>
<li id="five3" onmouseover="setTab('five',3,3)" >选项卡3</li>
<div id="con_five_1" > 选项卡1内容 </div>
<div id="con_five_2" "display:none"> 选项卡2内容 </div>
<div id="con_five_3" "display:none"> 选项卡3内容 </div>
成品效果案例：
