始终在页面底部的层js实现代码

<body onscroll="onboot()" onload="onboot()"> <style> table {border-top:6 solid blue; border-left:6 solid lime;border-right:6 solid orange; border-bottom:6 solid pink;border-collapse:collapse;} td {border-right:1 solid yellow; border-bottom:1 solid cyan;width:50px;border-collapse:collapse;} </style> <table cellpadding=0 cellspacing=0> <tr> <td> <td> <td> <td> <tr> <td> <td> <td> <td> <tr> <td> <td> <td> <td> </table> <p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa<p>aa <SCRIPT LANGUAGE="JavaScript"> <!-- function onboot(){ bt.style.top=document.body.scrollTop+document.body.clientHeight-bt.offsetHeight; } //--> </SCRIPT>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
注意：代码不符合标准，大家可以根据需要自行修改。