很多时候明明感觉应该自适应的效果，
可是在不同浏览器里却取得不同的结果，
这个时候最令人伤神。
有时利用“相对位置”和“绝对位置”方法来确定DIV的方位，
也是个很不错的想法，
至于如何使用，使用那种方法，
还是要看个人习惯以及网页整体要求。
来看看下面的方法，从中会掌握自适应的一种好方法。
XHTML
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<link href="2columngray.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="container">
<div id="mainheader">
<div class="blank2"></div>
<!-- for decoration only -->
</div>
<div id="header">
<p>Header content goes here</p>
<p><a href="2col_left.htm">Left </a>column Longest</p>
<p><a href="2col_right.htm">Right</a> column Longest</p>
<p><a href="2col_main.htm">No</a> column longest</p>
<p><a href="http://www.pmob.co.uk/temp/3colfixedtest_4.htm">Back</a> to main
3 column demo</p>
</div>
<div id="mainnav">
<p>Navigation</p>
</div>
<div id="sidebar">
<p>Sidebar content goes here : Sidebar content goes here : Sidebar content
goes here : Sidebar content goes here : Sidebar content goes here : Sidebar
content goes here : Sidebar content goes here : Sidebar content goes here
: Sidebar content goes here : Sidebar content goes here : Sidebar content
goes here : Sidebar content goes here : </p>
</div>
<div id="content">
<p>Footer stays at the bottom of the window unless the content is longer then
it stays at the bottom of the document.</p>
<p>Footer stays at the bottom of the window unless the content is longer then
it stays at the bottom of the document.</p>
</div>
<div id="clearfooter"></div>
<!-- to clear footer -->
<div id="footer">
<div class="divider1"></div>
<div class="blank"></div>
<!-- for decoration only -->
<p>Footer Content</p>
</div>
</div>
</body>
</html>
CSS
html, body{height:100%;}
/* end hack */
html,body {
margin: 0;
padding: 0;
}
body {
font: x-small arial, hevetica, sans-serif;
text-align: center;
color: #505367;
background-color: #e0e0e0;
}
#container {
margin-left:auto;
margin-right:auto;
width: 730px;
min-height:100%;
text-align: left;
background: #CEE0E1 url(images/toddbg.gif) repeat-y right top;
border-left: 1px solid #a1a1a1;
border-right: 1px solid #a1a1a1;
position:relative;
}
/* commented backslash hack v2 \*/
* html #container {height:100%;}
* html #container {width:732px;w\idth:730px;}
* html body{font-size:xx-small;f\ont-size:x-small}
/* end hack */
#mainheader {
position:absolute;
left:0;top:0;
height: 160px;
width:100%;
background-color: #fff;
border-bottom: 1px solid #e6e6e6;
z-index:1;
}
#header {
height: 125px;
width:100%;
background-color: #D1DCE9;
margin: 0px 0px 5px 0px;
border-top: 1px solid #e6e6e6;
border-bottom: 1px solid #e6e6e6;
position:relative;
z-index:2;
overflow:hidden;
}
* html #mainheader {height:161px;he\ight:160px}
* html #header {height:127px;he\ight:127px}
#mainnav {
width:100%;
height: 20px;
background-color: #f5f5f5;
border-top: 1px solid #e6e6e6;
border-bottom: 1px solid #e6e6e6;
position:relative;
z-index:2;
}
* html #mainnav{height:22px;he\ight:20px}
#sidebar {
float: right;
width: 170px;
padding:5px 0 ;
}
#content {
width: 553px;
padding:5px 0 ;
}
#content p, #sidebar p, #mainnav p, #header p,#footer p {margin:0 5px 5px 5px}
#footer{
position:absolute;
bottom:0;
width:100%;
height: 24px;
background-color: #f5f5f5;
border-top: 1px solid #e9e9e9;
}
#footer p {margin:0;padding:0}
* html #footer {height:25px;he\ight:24px;}
.divider1 {
width:100%;
height:5px;
overflow:hidden;
background:#fff;
position:relative;
border-bottom: 1px solid #e6e6e6;
}
#clearfooter {height:27px;width:100%;clear:both}
.blank , .blank2 {
position:absolute;
left:547px;
width:7px;
height:0px;
overflow:hidden;
border-top:1px solid #fff;
}
.blank {top:-1px;}
.blank2 {bottom:-1px;border-top:1px solid #fff;
}
