请教:用javascript来实现msn式的提示功能

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>太平洋??网</title>
<SCRIPT language=javascript>
//more javascript from http://www.smallrain.net
window.onload = enetgetMsg;
window.onresize = enetresizeDiv;
window.onerror = function(){}
var enetdivTop,enetdivLeft,enetdivWidth,enetdivHeight,enetdocHeight,enetdocWidth,enetobjTimer,i = 0;
function enetgetMsg()
{
try{
enetdivTop = parseInt(document.getElementById("enetMeng").style.top,10)
enetdivLeft = parseInt(document.getElementById("enetMeng").style.left,10)
enetdivHeight = parseInt(document.getElementById("enetMeng").offsetHeight,10)
enetdivWidth = parseInt(document.getElementById("enetMeng").offsetWidth,10)
enetdocWidth = document.body.clientWidth;
enetdocHeight = document.body.clientHeight;
document.getElementById("enetMeng").style.top = parseInt(document.body.scrollTop,10) + enetdocHeight + 10;// enetdivHeight
document.getElementById("enetMeng").style.left = parseInt(document.body.scrollLeft,10) + enetdocWidth - enetdivWidth
document.getElementById("enetMeng").style.visibility="visible"
enetobjTimer = window.setInterval("enetmoveDiv()",10)
}
catch(e){}
} 
　
function enetresizeDiv()
{
i+=1
if(i>600) enetcloseDiv()
try{
enetdivHeight = parseInt(document.getElementById("enetMeng").offsetHeight,10)
enetdivWidth = parseInt(document.getElementById("enetMeng").offsetWidth,10)
enetdocWidth = document.body.clientWidth;
enetdocHeight = document.body.clientHeight;
document.getElementById("enetMeng").style.top = enetdocHeight - enetdivHeight + parseInt(document.body.scrollTop,10)
document.getElementById("enetMeng").style.left = enetdocWidth - enetdivWidth + parseInt(document.body.scrollLeft,10)
}
catch(e){}
}
function enetmoveDiv()
{
try
{
if(parseInt(document.getElementById("enetMeng").style.top,10) <= (enetdocHeight - enetdivHeight + parseInt(document.body.scrollTop,10)))
{
window.clearInterval(enetobjTimer)
enetobjTimer = window.setInterval("enetresizeDiv()",1)
}
enetdivTop = parseInt(document.getElementById("enetMeng").style.top,10)
document.getElementById("enetMeng").style.top = enetdivTop - 1
}
catch(e){}
}
function enetcloseDiv()
{
document.getElementById('enetMeng').style.visibility='hidden';
if(enetobjTimer) window.clearInterval(enetobjTimer)
}
</SCRIPT>
</head><body bgcolor="#CCCCCC">
<DIV id=enetMeng 
style="BORDER-RIGHT: #455690 1px solid; BORDER-TOP: #a6b4cf 1px solid; Z-INDEX: 99999; LEFT: 0px; VISIBILITY: visible; BORDER-LEFT: #a6b4cf 1px solid; WIDTH: 241px; BORDER-BOTTOM: #455690 1px solid; POSITION: absolute; TOP: -200px; HEIGHT: 157px"> 
<TABLE WIDTH=255 BORDER=0 CELLPADDING=0 CELLSPACING=0 bgcolor="#DAE6FC">
<TR><TD height="30" valign="top" background="qqimages/heihei_1.jpg">
<table width="255" height="19" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="212" valign="bottom"><strong><font size="2">　<font color="#FF6600">消息框</font></font></strong></td>
<td width="43" style="cursor:hand" onClick="enetcloseDiv()"> </td>
</tr>
</table> </TD>
</TR>
<TR>
<TD height="122" background="qqimages/heihei_2.jpg" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="1">
<tr> 
<td width="95%"><table align="center" width="98%"><tr><td>
?迎?来到太平洋??网?件???目</td><tr></table></td>
</tr>
</table> </TD>
</TR>
<TR>
<TD>
<IMG SRC="qqimages/heihei_3.gif" WIDTH=255 HEIGHT=7 ALT=""></TD>
</TR>
</TABLE></div>
<h3>模?QQ消息提示框</h3>
<p>?明：模?QQ会?登??提示信息,自?面右下角慢慢升起的效果</p>
<p>使用方法：把head和body区域内的代?加入到相?位置即可。</p>
</body>
</html>