var ad=document.getElementById("ad");
ad.style.cssText="display:block;";
var i=0.01;
var j=1;
function setalpha()
{
	i=i+0.01;
	j=j+1;
	if(j<101){
	ad.style.cssText="filter:alpha(opacity="+j+");opacity:"+i+"; display:block;";
	}
	else
	{
		clearInterval(setstar);
		}
	}
var setstar=setInterval(setalpha,10);
setstar

function closethisbox()
{
	ad.style.cssText="display:none;";
	}
window.setTimeout(closethisbox,13000);