[csmcsm]

Made a slight tweak, to remove the link if the image was smaller than or 730px wide:

PHP Code:

/* Start Image RESIZE */  

         $navigator_user_agent = ( isset( $_SERVER['HTTP_USER_AGENT'] ) ) ? strtolower( $_SERVER['HTTP_USER_AGENT'] ) : ''; 
         if (@fopen($link, "r"))
         {  
         list($width, $height, $type, $attr) = getimagesize($link);
         }
        if (stristr($navigator_user_agent, "msie")) {
            $image_size_link = '
            <img src="' .  $link . '" border="0" rel="lightbox" title="'.$link.'" alt="" style="width: expression(this.width > 640 ? 480 : true);" />';   
                } 
                else {   
            $image_size_link = '<img src="' .  $link . '" border="0" rel="lightbox" title="'.$link.'" alt="" style="max-width: 730px;" />';
        }
        if (@fopen($link, "r"))
         { 
            if($width <= 730)
            {
                $image_size = '<a href="' .  $link . '" target="_blank">'.$image_size_link.'</a>';
            }
            else 
            {
            $image_size = '
                
                <table cellpadding="0" cellspacing="0" border="1">
                    <tr><td style="background-color:#000000;color:#FFFFFF;">
                <a href="' .  $link . '" target="_blank" style="color:#FFFFFF;text-decoration:none;">Click to enlarge image</a>
                    </td></tr>
                    <tr><td><a href="' .  $link . '" target="_blank">' . $image_size_link . '</a></td></tr>
                    <tr><td style="background-color:#000000;color:#FFFFFF;">
                <a href="' .  $link . '" target="_blank" style="color:#FFFFFF;text-decoration:none;">Click to enlarge image</a>
                    </td></tr>
                </table>
                
            ';   
            }
         
        return $image_size;
         }
/* End Image RESIZE */ 


requires GD though

also working on getting lightbox2 working with it


ANYONE using My code pre 12:44 20th january 2008 CET please update your code!