function addFavourite(item_id, item_type)
{
	var url = 'http://'+location.host+'/favourites/ajax_add_favourite.php';
	var pars = 'item_id=' + item_id + '&item_type=' + item_type;	
	var myAjax = new Ajax.Updater( 'div_fav_item_'+item_id, url, { method: 'get', parameters: pars });
}