Typical DIV + CSS layout - fixed width and centered layout , the use of a floating property; this example, the use of the absolute positioning properties.
1, set #container in "position: relative;", whose role is to make absolutely positioned behind the baseline to #container browser rather than their prospective.
2, the left and right columns #left_side #right_side column absolute positioning, and the two fixed-width div, and the middle column is automatically adjusted due to the need #content browser, is not set similar properties.
However, since the other two blocks of the position property absolute, it must be the case margin-left and margin-right properties are set to 190px
Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Debug="true" StylesheetTheme="Default" %>
<!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 runat="server">
<title>左中右版式</title>
</head>
<body>
<form id="form1" runat="server">
<div id="wrap">
<div id="header">header</div>
<div id="container">
<div id="left_side">left_side</div>
<div id="content">content</div>
<div id="right_side">right-side</div>
</div>
<div id="footer">footer</div>
</div>
</form>
</body>
</html>#wrap{
width:700px;
margin:0 auto;
}
#header{
margin:20px;
height:80px;
border:solid 1px #0000FF;
}
#container{
position:relative;
margin:20px;
height:400px;
}
#left_side{
position:absolute;
top:0px;
left:0px;
border:solid 1px #0000FF;
width:170px;
height:100%;
}
#content{
margin:0px 190px 0px 190px;
border:solid 1px #0000FF;
height:100%;
}
#right_side{
position:absolute;
top:0px;
right:0px;
border:solid 1px #0000FF;
width:170px;
height:100%;
}
#footer{
margin:20px;
height:80px;
border:solid 1px #0000FF;
}
