function pop(w,h,f) {
	var l = Math.floor((screen.width-w)/2);
	var t = Math.floor((screen.height-h)/2);
	window.open(f,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l +",scrollbars=no");
}
function popscroll(w,h,f) {
	var l = Math.floor((screen.width-w)/2);
	var t = Math.floor((screen.height-h)/2);
	window.open(f,"","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l +",scrollbars=yes");
}