<title>DIV层切换</title>
<script language="JavaScript" type="text/javascript">
function ChangeDiv(divId,divName,zDivCount)
{
for(i=0;i<=zDivCount;i++)
{
document.getElementById(divName+i).style.display="none";
//将所有的层都隐藏
}
document.getElementById(divName+divId).style.display="block";
//显示当前层
}
</script>
</head>
<body>
<span onMouseOver="ChangeDiv(‘0‘,‘JKDiv_‘,2)" style="cursor:hand;">内容一</span>
<span onMouseOver="ChangeDiv(‘1‘,‘JKDiv_‘,2)" style="cursor:hand;">内容二</span>
<span onMouseOver="ChangeDiv(‘2‘,‘JKDiv_‘,2)" style="cursor:hand;">内容三</span>
<div id="JKDiv_0" style="font-size:14px;margin:10px;color:#FF0000; border:1px solid red; width:200px; height:200px">内容部分第一区</div>
<div id="JKDiv_1" style="display:none;font-size:14px;margin:10px;color:#FF0000; border:1px solid red;width:200px; height:200px">内容部分第二区</div>
<div id="JKDiv_2" style="display:none;font-size:14px;margin:10px;color:#FF0000;">内容部分第三区</div>
</body>
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原文：http://bao1073740756-126-com.iteye.com/blog/2307818