function activateLightbox()
{
   if (!document.getElementsByTagName) return;

   var anchors = document.getElementsByTagName("a");

   for (var i=0; i< anchors.length; i++)
   {
	    var anchor = anchors[i];
	    var kon = anchor.getAttribute("href").match(/\.(jpg|jpeg|png|mp3|avi|swf|mpeg|mpg)$/);

	    if(kon)
	    {

		     switch(kon[1])
		     {
			      case 'jpg':
			      case 'jpeg':
			      case 'png':
			      case 'gif':
			      anchor.setAttribute("rel","lightbox[x]");;
	          break;

		     }

	    }

   }
}


function addEvent(obj, evType, fn)
{
   if (obj.addEventListener)
   {
      obj.addEventListener(evType, fn, false);
      return true;
   }
   else if (obj.attachEvent)
   {
      var r = obj.attachEvent("on"+evType, fn);
      return r;
   }
   else
   {
      return false;
   }
}

addEvent(window, 'load', activateLightbox);