null;

whichIt = null; 

IE = (document.all) ? 1: 0;

function heartBeat() {
	
	xdiff= (document.body.scrollLeft + window.document.body.clientWidth/2-150 - document.all.center_floater.style.pixelLeft) * 0.9
	ydiff=(document.body.scrollTop + window.document.body.clientHeight/2-100 - document.all.center_floater.style.pixelTop ) * 0.9
	
	document.all.center_floater.style.pixelLeft = document.body.scrollLeft + window.document.body.clientWidth/2-150 -xdiff;
	document.all.center_floater.style.pixelTop = document.body.scrollTop + window.document.body.clientHeight/2-100 - ydiff;

}

function Close_AD() {

document.all.center_floater.style.visibility="visible";

}

function Open_AD() {

document.all.center_floater.style.visibility="visible";

}

window.setInterval("heartBeat()", 1);