var aoFilterArticleGroups = {

        handleSuccess:function(o)
        {
            this.processResult(o);
        },

        handleFailure:function(o)
        {

        },

        processResult:function(o)
        {
            result = o.responseText.parseJSON();
            groups = result['all'];
            ids = result['ids'];

            for (i in ids)
            {
                if ( i != 'toJSONString');
                {
                    node = tree.getNodeByProperty( 'group_id', ids[i] );

                    if ( node )
                    {
                        if ( node.labelStyle )
                        {
                            node.labelStyle = 'ygtvlabelfiltered';
                        }
                    }
                }
            }

            for (i in groups)
            {
                if ( i != 'toJSONString')
                {
                    node = tree.getNodeByProperty( 'group_id', groups[i] );

                    if ( node )
                    {
                       node.expand();
                    }
                }
            }

            tree.draw();

            document.getElementById( 'loadingDiv' ).style.display = 'none';
            document.getElementById( 'treeDiv' ).style.display = 'block';
        },

        startRequest:function()
        {
            if (document.getElementById( 'filter_by' ).value)
            {
                document.getElementById( 'treeDiv' ).style.display = 'none';
                document.getElementById( 'loadingDiv' ).style.display = 'block';

                tree.clearFilteredNodes();

                YAHOO.util.Connect.asyncRequest( 'POST', '/ajax/ajax.php', aoFilterArticleGroupsCallback, "action=getFilteredArticleGroups&filter_by=" + document.getElementById( 'filter_by' ).value );
            }
        }
    };

    /*
     * Define the callback object for success and failure
     * handlers as well as object scope.
     */
    var aoFilterArticleGroupsCallback =
    {
        success:aoFilterArticleGroups.handleSuccess,
        failure:aoFilterArticleGroups.handleFailure,
        scope: aoFilterArticleGroups
    };