function popup(url, name, width, height, scroll)
{
	var left = screen.width;
	var top = screen.height;
    if (scroll == 1) {
        var scrollbars = "yes";
        width += 16;
    }
    else {
        var scrollbars = "no";
    }
	left = (left - width) / 2;
	top = (top - height) / 2;
	window.open(url, name, "height=" + height + ", width=" + width + ", top=" + top + ", left=" + left + ", scrollbars=" + scrollbars + ", resizable=no");
}