function move_adverts() {

	var sw = screen.width;
	var a1 = sw-"565";
	var b1 = a1*"0.5";
	var c1 = b1-"145";
	var c2 = b1-"225";
	
	document.getElementById("adv1l").style.position='absolute';
	document.getElementById("adv1l").style.top='650px';
	document.getElementById("adv1l").style.left=c1+"px";
	
	document.getElementById("adv2l").style.position='absolute';
	document.getElementById("adv2l").style.top='530px';
	document.getElementById("adv2l").style.left=c2+"px";
	
	document.getElementById("adv1r").style.position='absolute';
	document.getElementById("adv1r").style.top='650px';
	document.getElementById("adv1r").style.right=c1+"px";
	
	document.getElementById("adv2r").style.position='absolute';
	document.getElementById("adv2r").style.top='530px';
	document.getElementById("adv2r").style.right=c2+"px";
	
}