The source code

    Imgorg.DirectCombo = Ext.extend(Ext.form.ComboBox, {
        displayField: 'text',
        valueField: 'id',
        triggerAction: 'all',
        queryAction: 'name',
        forceSelection: true,
        mode: 'remote',

        initComponent: function() {
            this.store = new Ext.data.DirectStore(Ext.apply({
                api: this.api,
                root: '',
                fields: this.fields || ['text', 'id']
            }, this.storeConfig));

            Imgorg.DirectCombo.superclass.initComponent.call(this);
        }
    });

    Imgorg.TagCombo = Ext.extend(Imgorg.DirectCombo,{
        forceSelection: false,
        storeConfig: {
            id: 'tag-store'
        },
        initComponent: function() {
            Ext.apply(this.storeConfig, {
                directFn: Imgorg.ss.Tags.load
            });
            Imgorg.TagCombo.superclass.initComponent.call(this);
        }
    });
    Ext.reg('img-tagcombo', Imgorg.TagCombo);

    Imgorg.TagMultiCombo = Ext.extend(Ext.ux.MultiCombo,{
        listClass: 'label-combo',
        displayField: 'text',
        valueField: 'id',

        initComponent: function() {
            this.store = new Ext.data.DirectStore(Ext.apply({
                directFn: Imgorg.ss.Tags.load,
                root: '',
                autoLoad: true,
                fields: this.fields || ['text', 'id']
            }, this.storeConfig));
            this.plugins =new Ext.ux.MultiCombo.Checkable({});
            Imgorg.DirectCombo.superclass.initComponent.call(this);
        }
    });
    Ext.reg('img-tagmulticombo', Imgorg.TagMultiCombo);

    Imgorg.AlbumCombo = Ext.extend(Imgorg.DirectCombo, {
        storeConfig: {
            id: 'album-store'
        },
        initComponent: function() {
            Ext.apply(this.storeConfig, {
                directFn: Imgorg.ss.Albums.getAllInfo
            });
            Imgorg.AlbumCombo.superclass.initComponent.call(this);
        }
    });
    Ext.reg('img-albumcombo', Imgorg.AlbumCombo);