使用zindex属性让控件显示在最上层-CFANZ编程社区

使用zindex属性让控件显示在最上层

设置示例：

<div id="a1" style="position:absolute;left:100px;top:100px;width:100px;height:100px;
background-color:#ddeeff;z-index:1">
   div>
<div id="a2" style="position:absolute;left:150px;top:130px;width:100px;height:100px;
background-color:#eeffdd;z-index:2">
    div>
<div id="a3" style="position:absolute;left:200px;top:160px;width:100px;height:100px;
background-color:#ffddee;z-index:3">
     div>

DEMO：

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>
   title>
<script type="text/javascript">
function $(obj){
return document.getElementById(obj);
}
function change(n){
for (var i=1;i<4;i++){
if(n==i){
$("a"+i).style.zIndex="100";
}else{
$("a"+i).style.zIndex="0";
}
}
}

    script>

     head>
<body>
<div id="a1" style="position:absolute;left:100px;top:100px;width:100px;height:100px;
background-color:#ddeeff;z-index:1" onclick="change('1')" >
      div>
<div id="a2" style="position:absolute;left:150px;top:130px;width:100px;height:100px; background-color:#eeffdd;z-index:2" onclick="change('2')">
       div> <div id="a3" style="position:absolute;left:200px;top:160px;width:100px;height:100px; background-color:#ffddee;z-index:3" onclick="change('3')">
        div> 
         body> 
          html>

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