float ad浮动广告代码

<html><head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <meta name="GENERATOR" content="Microsoft FrontPage 4.0"> <meta name="ProgId" content="FrontPage.Editor.Document"> <title>New Page 1</title> <script language="javascript">    var isRight=true;    var isDown=true;    function init()    {       float();    }        function float()    {       var top_u=parseInt(document.body.offsetHeight)-parseInt($("ad").style.height);;       var top_l=0;       var left_u=parseInt(document.body.offsetWidth)-parseInt($("ad").style.width);       var left_l=0;       var mx=+parseInt(Math.random()*10);       var my=+parseInt(Math.random()*10);              if(parseInt($("ad").style.left)<parseInt(document.body.scrollLeft))       {          isRight=true;       }       else if(parseInt($("ad").style.left)>parseInt(document.body.scrollLeft)+left_u)       {          isRight=false;       }       if(parseInt($("ad").style.top)<=parseInt(document.body.scrollTop))       {          isDown=true;       }       else if(parseInt($("ad").style.top)>parseInt(document.body.scrollTop)+top_u)       {          isDown=false;       }       mx=isRight?mx:0-mx;       my=isDown?my:0-my;       $("ad").style.left=parseInt($("ad").style.left)+mx;       $("ad").style.top=parseInt($("ad").style.top)+my;       setTimeout("float()",50)          }        function $(id)    {       return document.getElementById(id)    }        function ind(str,s)    {       document.body.insertAdjacentHTML("BeforeEnd",str+s);    } </script> </head margin=0> <body onload=init()> <div id="ad" style="position:absolute;height:0px;width:0px; border:1px solid black; width:100px; height:70px; left:0px;top:0px; height:0px;"></div>   </body></html>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

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float ad浮动广告代码

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