z-index 高低值1 属性
<head>
<title>z-index属性</title>
<style type="text/css">
<!--
body{
margin:10px;
font-family:Arial;
font-size:13px;
}
#block1{
background-color:#fff0ac;
border:1px dashed #000000;
padding:10px;
position:absolute;
left:20px;
top:30px;
z-index:1; /* 高低值1 */
}
#block2{
background-color:#ffc24c;
border:1px dashed #000000;
padding:10px;
position:absolute;
left:40px;
top:50px;
z-index:0; /* 高低值0 */
}
#block3{
background-color:#c7ff9d;
border:1px dashed #000000;
padding:10px;
position:absolute;
left:60px;
top:70px;
z-index:-1; /* 高低值-1 */
}
-->
</style>
</head>
<body>
<div id="block1">AAAAAAAA</div>
<div id="block2">BBBBBBBB</div>
<div id="block3">CCCCCCCC</div>
</body>
</html>
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