[mtha]

very nice mod.
I would still display the image with the limitation of width=$img_max_width

PHP Code:

 $inp_string = "<a href=\"#\" onclick=\"window.open('".$link."','OgiginalImage','statusbar=no,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=".$img_width[0].",height=".$img_width[1]."'); return false;\"><img src=\"".$link."\" alt=\"Original Image is too big\" border=\"0\" width=\"".$img_max_width."\"/></a><br />\n";
return $inp_string;