function photo_popup(id,unit_id) {
	// all this does is pop up a window with a script call in it for photo viewing.
	window.open("http://www.northernvacation.com/cgi-bin/public/photo_view.pl?id=" + id + "&unit_id=" + unit_id,'PhotoViewer','width=620,height=480,resizable=yes,scrollbars=yes,menubar=no,statusbar=no');
}