//this function can be activated by the PHP image_popup function
//defined in the image_popup.php library for auto width/height
//detection.
function image_popup(url, width, height)
{
	window.open(url,'image_popup','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,copyhistory=no,width='+(width+20)+',height='+(height+20)+',screenX=150,screenY=150,top=150,left=150');
}