#header{height:80px; background:#CCC;}
#center{overflow:hidden; zoom:1;}
#main_wrapper{float:left; width:100%; margin-top:10px; margin-left:-210px;}
#main{200px;210px;#999;}
#sidebar{right; height:#AAA;}
#footer{50px;#CCC;}
<div id="header"></div>
="center">
="main_wrapper">
="main"</="sidebar"="footer">
#sidebar-l {
#main-wrapper {margin-top: float:-420px;200px;}
#main {margin-left:438px;#999;
#sidebar-r {="sidebar-l">这里是左边="main-wrapper">这里是中间="sidebar-r">这里是右边>
服务热线 19970861797
