function addEvent(object, event, func)
{ 

	if (object.addEventListener)
  { 
	object.addEventListener(event, func, false); 
	return true; 
	} 
	else if (object.attachEvent) 
	{ 
	var result = object.attachEvent("on" + event, func); 
	return result; 
 	}
	else 
	{ 
	return false; 
	} 

}





function hideDiv(div_id)
{

   if (document.getElementById && document.getElementById(div_id))
   {
   document.getElementById(div_id).style.display = 'none';
   }

}

function hideLightbox()
{
hideDiv('lightbox_images');
}