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|gif|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);