function pages_update_mediagallery(page_id,subpage_id,mediagallery_id) { 
	http.open('get', 'ajax/gates.ajax.php?pages_update_mediagallery=1&page_id='+page_id+'&subpage_id='+subpage_id+'&mediagallery_id='+mediagallery_id);
	http.onreadystatechange = handle_pages_update_mediagallery;
	http.send(null);
}

function handle_pages_update_mediagallery() {
  if(http.readyState == 4) {
  	var response = http.responseText;
  	
  	document.getElementById('mediagallery_large').innerHTML=response;
  }
}