function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}
function createGallery(){
var images = document.getElementsByTagName("a");
iCount = 6;
	for (var i=0; i<images.length; i++){
		if (!images[i].getAttribute("title")) continue;
		images[i].setAttribute("rel", "lightbox[gallery]");
	}
}

addLoadEvent(createGallery);