function LightboxDelegate(url,caption) {
var objLink = document.createElement('a');
objLink.setAttribute('href',url);
objLink.setAttribute('rel','lightbox');
objLink.setAttribute('title',caption);
if(typeof width != 'undefined') {
      objLink.setAttribute('width',width); 
   }
   if(typeof height != 'undefined') {
      objLink.setAttribute('height',height);
   }
Lightbox.prototype.start(objLink);
}