The source code

    Imgorg.TagWindow = Ext.extend(Ext.Window, {
        title: 'Choose Tag',
        layout: 'fit',
        closeAction: 'hide',
        width: 300,
        modal: true,

        initComponent: function() {
            Ext.apply(this, {
                items: [{
                    autoHeight: true,
                    xtype: 'form',
                    id: 'tag-select',
                    bodyStyle: 'padding:15px',
                    labelWidth: 50,
                    items: [{
                        anchor: '95%',
                        fieldLabel: 'Tag',
                        xtype: 'img-tagcombo',
                        name: 'tag',
                        allowBlank: false
                    }]
                }],
                buttons: [{
                    text: 'Tag Images',
                    handler: this.tagImages,
                    scope: this
                },{
                    text: 'Cancel',
                    handler: function() {
                        this.hide();
                    },
                    scope: this
                }]
            });
            Imgorg.TagWindow.superclass.initComponent.call(this);
        },

        tagImages: function() {
            var af = this.getComponent('tag-select').getForm();
            if (af.isValid()) {
                if (this.selectedRecords) {
                    var imageIds = [];
                    for (var i = 0; i < this.selectedRecords.length; i++) {
                        var r = this.selectedRecords[i];
                        imageIds.push(r.data.dbid || r.data.id);
                    }
                    var fld = af.findField('tag');
                    var tag = fld.getRawValue();
                    var idx = fld.store.find('text', tag);
                    if (idx != -1) {
                        rec = fld.store.getAt(idx);
                        tag = rec.data.id;
                    }
                    Imgorg.ss.Images.tagImage({
                        images: imageIds,
                        tag: tag
                    });
                }
                this.hide();
            }
        }
    });