z-index html

最新推荐文章于 2025-07-22 00:16:16 发布

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最新推荐文章于 2025-07-22 00:16:16 发布

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文章标签： xhtml

本文探讨了在HTML页面布局中使用z-index属性实现元素层叠的问题，通过多个实例展示了不同定位方式下z-index的设置如何影响元素的堆叠顺序，并分析了静态与相对定位的区别。

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z-index html：

<!DOCTYPE html PUBLIC "-//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" />
<meta name="author" content="Chomo" />
<link rel="start" href="http://www.14px.com" title="Home" />
<title>��壺��ͬ��Ԫ�أ��һ�߻��Ԫ��ӵ�ж�̬��λʱ��ͬʱ��Ѱ�Ҷ�̬��λ��Ԫ�أ��ֱ��ó��߱��߼��Ԫ�أ��䱾��бȽϡ�</title>
</head>
<style type="text/css">
div { font:12px/1.5 arial;}
div strong { color:#fff; background:#036; display:inline-block;}
h3 strong { color:#f00;}
/*--- ��巽�� ---*/
.div1,
.div2 {
height:70px;
width:150px;
background:#cff;
border:1px solid #036;
}
.grandDiv1,
.grandDiv2 {
padding:10px;
border:1px solid #060;
width:174px;
background:#cf9;
}
.parentDiv1,
.parentDiv2 {
padding:10px;
border:1px solid #f06;
width:152px;
background:#fcf;
}
/*--- ��巽��ƫ��λ�á��λ�� ---*/
.grandDiv2 {
margin-top:-50px;
margin-left:95px;
}
.parentDiv2 {
margin-top:-40px;
margin-left:85px;
}
.div2 {
margin-top:-20px;
margin-left:75px;
padding-top:30px;
height:40px;
}
.grandDiv2 .parentDiv2,
.grandDiv2 .div2,
.parentDiv2 .div2 { margin:0;}
</style>
<body>
<h3>��<strong>��Ҫ��</strong>��ͬ��Ԫ�أ��һ�߻��Ԫ��ӵ�ж�̬��λʱ��ͬʱ��Ѱ�Ҷ�̬��λ��Ԫ��е��Ԫ�ص��һ��Ϊֹ��ֱ��ó��߱��߼��Ԫ�أ��䱾��бȽϡ�</h3>
<p>��1��Ԫ�ص�z-index��۶��?�Ԫ�ش��߾��ϡ�<p>
<div class="parentDiv1" style="position:relative; z-index:2;">
.parentDiv1{position:relative;<strong>z-index:2</strong>}
<div class="div1">.div1{position:static}</div>
</div>
<div class="parentDiv2" style="position:relative; z-index:1;">
<div class="div2" style="position:relative; z-index:10000;">.div2{position:relative;<strong>z-index:10000</strong>}</div>
.parentDiv2{position:relative;<strong>z-index:1</strong>}
</div>
<p>��2��Ԫ�ؾ��£��Ԫ��Ҳ��Ծ��ϡ�<p>
<div class="parentDiv1">
.parentDiv1{position:staitc}
<div class="div1" style="position:relative;">.div1{position:relative}</div>
</div>
<div class="parentDiv2">
<div class="div2">.div2{position:staitc}</div>
.parentDiv2{position:staitc}
</div>
<p>��1��2��չ�Ƚϡ�<p>
<div class="grandDiv1" style="position:relative; z-index:3;">
.grandDiv1{position:relative;<strong>z-index:3</strong>}
<div class="parentDiv1">
.parentDiv1{position:staitc}
<div class="div1" style="position:relative; z-index:10000;">.div1{position:relative;<strong>z-index:10000</strong>}</div>
</div>
</div>
<div class="grandDiv2">
<div class="parentDiv2" style="position:relative; z-index:4;">
<div class="div2">.div2{position:staitc}</div>
.parentDiv2{position:relative;<strong>z-index:4</strong>}
</div>
.grandDiv2{position:static;}
</div>
</body>
</html>