// JavaScript Document

//从页头向下推展开广告

//setTimeout("close_chk_show()",20000);


function show_it(){
showbanner();
var anim = function(){
n += 50;
if(n >= 230){
document.getElementById('noticediv').style.marginTop = "0";
window.clearInterval(t1);
}
else{
document.getElementById('noticediv').style.marginTop = "-"+(230 - n)+"px";

}
}
var n=0;
var t1 = window.setInterval(anim,1);

}




function close_chk_show(){

  var anim = function(){
   n += 40;
   if(n >= 230){
     document.getElementById('noticediv').style.marginTop = "-230px";
     window.clearInterval(t1);
     hidebanner();
   }
   else{
     document.getElementById('noticediv').style.marginTop = "-"+ n +"px";
   }
 };
 var n=0;
 var t1 = window.setInterval(anim,1);
}

function showbanner()
{
	document.getElementById('noticediv').style.display = "block";
}
function hidebanner()
{
document.getElementById('noticediv').style.display = "none";
}