function popup(url) {
	new_window=window.open(url,'photo_gallery','height='+screen.height+',width=790,left='+((screen.width/2)- 395)+',top=0,location=no,menubar=no,status=yes,toolbar=no,scrollbars=yes,resizable=yes');
	if (window.focus) {
		new_window.focus();
		}
	return false;
}