Check out this browser picked site:<p><a href=http://artcontext.com/><img src=artcontext.gif 
             width="49" height="8" border=0 alt="Welcome to Artcontext"></a>
<p>&nbsp;</p>
<p>&nbsp;</p>
<hr>
<b>Code:</b>
<pre>
&lt;?
      $img["Netscape"] = "artcontext.gif";
      $url["Netscape"] = "http://artcontext.com/";
      $alt["Netscape"] = "Artcontext";

      $img["MSIE"] = "andyland.gif";
      $url["MSIE"] = "http://www.andyland.net";
      $alt["MSIE"] = "Andyland";

      $img["default"] = "andyland.gif";
      $url["default"] = "http://www.andyland.net";
      $alt["default"] = "Andyland";

      /* Do not modify the following nine lines */
      $browser="default";
      if (preg_match("/Mozilla/i",$_SERVER['HTTP_USER_AGENT'])){
        $browser="Netscape";
      }
      if (preg_match("/MSIE/i",$_SERVER['HTTP_USER_AGENT'])){
        $browser="MSIE";
      }
      $wh = getImageSize($img[$browser]);

      /*******************************************/

      print("Check out this browser picked site:&lt;p>");
      print("&lt;a href=$url[$browser]>&lt;img src=$img[$browser]
             $wh[3] border=0 alt=\"$alt[$browser]\">&lt;/a>");

?>