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;// 
document.getElementById("show").style.top = parseInt(document.body.scrollTop,10) + enetdocHeight + 10;// enetdivHeight
document.getElementById("enetMeng").style.left = 0
document.getElementById("show").style.left = 0
document.getElementById("enetMeng").style.visibility="visible"
enetobjTimer = window.setInterval("enetmoveDiv()",10)
}
catch(e){}
} 
function btn1_onclick() {
var ff=document.getElementById("enetMeng");
var dd=document.getElementById("show");
ff.style.display="none";
dd.style.display="block";
//enetcloseDiv()
}　
function btn2_onclick() {
var ff=document.getElementById("enetMeng");
var dd=document.getElementById("show");
dd.style.display="none";
ff.style.display="block";
//enetcloseDiv()
}　
function enetresizeDiv()
{
i+=1
if(i>999999999) enetcloseDiv() /自动关闭时间
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("show").style.top = enetdocHeight - enetdivHeight -20 + parseInt(document.body.scrollTop,10)
document.getElementById("enetMeng").style.left = 0
document.getElementById("show").style.left = 0
}
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 - 20
}
catch(e){}
}
function enetcloseDiv()
{
document.getElementById('enetMeng').style.visibility='hidden';
if(enetobjTimer) window.clearInterval(enetobjTimer)
}