还是DATALIST问题

<body>
<form id="Tips" method="post" runat="server">
<table border="1"><tr><td onmousemove="showTip('hello');" onmouseout="hide();">sfsfsafsdfasfsa</td></tr></table>
</form>
<script language=javascript>
<!--
var tip=null;

function document.body.onload()
{
tip=document.createElement("div");
tip.style.position="absolute";
tip.style.visibility="hidden";
tip.style.boderStyle="solid";
tip.style.borderWidth="1px";
tip.style.borderColor="buttonshadow";
tip.style.backgroundColor="yellow";
document.body.appendChild(tip);
}

function showTip(str)
{
var obj=window.event.srcElement;
tip.style.left=window.event.clientX+"px";
tip.style.top=window.event.clientY+"px";
tip.innerText=str;
tip.style.visibility="visible";
}

function hide()
{
tip.style.visibility="hidden";
}
//-->
</script>
</body>