function popWindow(url, width, height, win, scrollbars) {
	var left = (screen.width - width) / 2;
	var top = (screen.height - height) / 2;
	if (win == undefined) win = "_blank";
	if (scrollbars != 1) scrollbars = 0;
	newwindow = window.open(url, win, 'toolbar=0,location=0,status=0,menubar=0,scrollbars=' + scrollbars + ',resizable=0,width=' + width + ',height=' + height + ',left=' + left + ',top=' + top);
	if (window.focus) newwindow.focus();
}