function window_open(filename, name, scroll,  x, y) {
	if(screen.width){
		var winleft = (screen.width-x)/2;
		var wintop = (screen.height-y)/2;
	}else{	winleft = 200;wintop = 200;}
	windowops = eval("'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=" + scroll + ",resizable=no,copyhistory=yes,width=" + x + ",height=" + y + ",left=" + winleft + ",top=" + wintop + "'");
	popoup = window.open(filename, name, windowops);
	popoup.focus();
	return;
}