div控制

deepfuture · 发表于 2013-2-8 00:18:45

<!DOCTYPE   HTML   PUBLIC   "-//W3C//DTD   HTML   4.0   Transitional//EN">
<html>
<head>
<meta   http-equiv="pragma"   content="no-cache">
<meta   http-equiv="Content-Type"   content="text/html;   charset=gb2312">
<title> 新建网页 </title>
<style   type="text/css">
#mylayer   div{
display:none;
}
</style>
</head>
<body>
<select   id="sel"   onchange="f(this);">
<option> a </option>
<option> b </option>
<option> c </option>
<option> d </option>
</select>
<div   id="mylayer">
<div style="display:block;"> 层1 </div>
<div> 层2 </div>
<div> 层3 </div>
<div> 层4 </div>
</div>
<script   language="javascript">
function   f(obj){
var   mylayers   =   document.getElementById("mylayer").getElementsByTagName("DIV");
for(var   i=0;   i <mylayers.length;   i++){
mylayers[i].style.display   =   "none";
}
mylayers[obj.selectedIndex].style.display   =   "block";
}
</script>
</body>

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