function openWindow(url, name, width, height, scroll){
	var x = (screen.availWidth-width)/2;
	var y = (screen.availHeight-height)/2;
	scroll = scroll ? "scrollbars=yes,resizable=yes," : "scrollbars=no,resizable=no,";
	window.open(url,name,"toolbar=no,location=no,status=no,menubar=no,"+scroll+"width="+width+",height="+height+",screenX="+x+",screenY="+y+",top="+y+",left="+x);
}