div suspended

WBOY
Release: 2016-08-30 09:21:10
Original
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<!DOCTYPE html <span style="color: #0000ff;">PUBLIC</span> "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
</style>
</head>
<body>
<!--z-index 属性设置元素的堆叠顺序。拥有更高堆叠顺序的元素总是会处于堆叠顺序较低的元素的前面。z-index 仅能在定位元素上奏效(例如 position:absolute;)!-->
<div style='position:relative; width:500px; height:500px;'>
<div style='position:absolute; z-index:2; width:300px; height:300px; left:0px; top:0px; background-color:red;'></div>
<div style='position:absolute; z-index:3; width:200px; height:200px; left:0px; top:0px;background-color:green;''<span style="color: #000000;">></div>
</div>
</body>
</html> 
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