ExtJS Combo

MODx.combo.WeekDay = function(config) {
    config = config || {};
    Ext.applyIf(config,{
        displayField: 'name'
        ,valueField: 'id'
        ,mode: 'local'
        ,store: new Ext.data.SimpleStore({
            fields: ['id', 'name'],
            data: [[1, 'mon'], [2, 'tue']]
        })
        ,emptyText: 'Week day'
        ,editable: false
    });
    MODx.combo.WeekDay.superclass.constructor.call(this,config);
};
Ext.extend(MODx.combo.WeekDay, MODx.combo.ComboBox);
Ext.reg('schedule-combo-weekday', MODx.combo.WeekDay);

//Then in grid config:
{
            xtype: 'schedule-combo-weekday'
            ,fieldLabel: _('schedule.week_day')
            ,name: 'week_day'
            ,id: 'schedule-'+this.ident+'-week_day'
            ,width: 200
}

,editor: { xtype: 'timefield', format: MODx.config.manager_time_format}