CSS 布局之分栏显示

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title> New Document </title>
  <meta name="Generator" content="EditPlus">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <style type="text/css">
        body
        {
                background:#35d2e8;
                font:normal 100% Verdana,Arial,宋体,Helvetica,sans-serif;
                margin:0px;
                padding:0px;
        }
        #content_head
        {
                background:#e05a0a;
                border:5px solid #fff;
                height:130px;
                margin:20px 20px 0px 20px;
                padding:0px;
                height:120px;
        }
        #content_head p
        {
                color:#fff;
                font-weight:bold;
                margin:10px;
                line-height:100px;
        }
        #content_left
        {
                background:#e050a0;
                border:5px solid #fff;
                margin:10px 0px 20px 20px;
                padding:0px;
                position:absolute;
                top:150px;
                left:0px;
                width:160px;
                height:450px;
        }
        #content_center
        {
                background:#e05a0a;
                border:5px solid #fff;
                margin:10px 200px 20px 200px;
                padding:0px;
        }
        #content_center div
        {
                height:450px;
                width:100%;
        }
        #content_right
        {
                background:#e05a0a;
                border:5px solid #fff;
                margin:10px 20px 20px 0px;
                padding:0px;
                position:absolute;
                top:150px;
                right:0px;
                width:160px;
                height:450px;
        }
  </style>
 </head>

 <body>
  <div ><p>页头部分</p></div>
  <div ></div>
  <div >
        <div>
                
        </div>
  </div>
  <div ></div>
 </body>
</html>