function popup_gallery(photo_id, window_width, window_height) {
    var window_height_new;
	window_width = window_width + 20;
	window_height = window_height + 50;
	if((screen.availHeight-100) < window_height) window_height_new = screen.availHeight-125;
	else window_height_new = window_height;

	var window_dimensions = "height=" + window_height_new + 
                            ",width=" + window_width + 
                            ",left=25" + 
                            ",top=50" +
                            ",toolbar=0,menubar=no,statusbar=yes,resizable=yes,scrollbars=no"											
    var new_win = window.open("/gallery_window.php?id=" + photo_id, "", window_dimensions);
	new_win.focus();
	return false;
}