css控制div置顶置底的例子

  •   2009-07-31/13:36
  • <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
    <html xmlns=""  xml:lang="zh-CN" lang="zh-CN">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <meta http-equiv="Content-Language" content="zh-cn" />
    <title>why?</title>
    <meta name="robots" content="index, follow" />

    <meta name="googlebot" content="index, follow" />
    <style type="text/css" media="screen">
    <!--
    * {margin:0;padding:0;}
    body {margin:0 auto;font:12px/20px tahoma Simsun Arial;color:#fff;background-color:#FFF;text-align:center;}
    .aaa{ width:150px; background:Blue;position:absolute;left:0;top:0; }
    .bbb{ width:150px; background:Blue;position:absolute;right:0;top:0; }
    .ccc{ width:150px; position:absolute; top:100%;left:0; margin-top:-20px;  background:Blue;}
    .ddd{ width:150px; position:absolute; top:100%;right:0; margin-top:-20px;  background:Blue;}

    .aa{ width:50px; position:fixed; background:Black; _position:absolute;_top:expression(eval(document.documentElement.scrollTop));z-index:1000;left:0;top:0; }

    .bb{ width:50px; position:fixed; background:Black; _position:absolute;_top:expression(eval(document.documentElement.scrollTop));z-index:1000;right:0;top:0; }
    .a{ color:#000; }
      -->
    </style>
    </head>
    <body>
    <div class="aaa">AAA</div>
    <div class="bbb">BBB</div>
    <div class="aa">A</div>
    <div class="bb">B</div>
    <div class="a">
    <br /><br /><br /><br />
    <br />
    A层和B层会随滚动条移动永久置顶
    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
    <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
    </div>
    <div class="ccc">CCC</div>
    <div class="ddd">DDD</div>
    </body>
    </html>


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    B {{question.B}}
    C {{question.C}}
    D {{question.D}}
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