function openWindow (url){
	var sx=(screen.width/2)-380;
	var sy=(screen.height/2)-350;
	window.open(url,'index','scrollbars=0,resizable=0,toolbar=0,status=1,location=0,width=760,height=700,screenX='+sx+',screenY='+sy+',left='+sx+', top='+sy);
	
	}