这个仅供参考 其它的同理
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <META NAME="Generator" CONTENT="EditPlus">
  <META NAME="Author" CONTENT="">
  <META NAME="Keywords" CONTENT="">
  <META NAME="Description" CONTENT="">
 </HEAD> <BODY>
  <script language="javascript" type="text/javascript"> 
function move(xx,yy,Okgo)
{
    document.getElementById(Okgo).style.left=--xx; 
    document.getElementById(Okgo).style.top=++yy; 
    setTimeout("move("+xx+","+yy+","+"'Layer1')",80); 
} </script> 
    <form id="form1" runat="server" >    
<div id="Layer1" style="position:absolute;left:1px;top:1px;width:150px;height:102px;z-index:1;background-color: #eeeeee;" > 
<script type="text/javascript"> 
move(100,100,'Layer1'); 
</script> 
</div> 
 </BODY>
</HTML>