ExtJS ComboBox with local store and change action listener.

new Ext.form.ComboBox({
    fieldLabel: '',
    id: 'searchtypeforcontacts',
    name: 'searchtype',
    x:200,
    labelSeparator :'',
    editable: false,
    store: new Ext.data.SimpleStore({
        fields: ['id', 'header'],
        data: [
            ['id', 'Contact Id'],
            ['first_name', 'Given Name'],
            ['email', 'Email'],
            ['country', 'Country'],
            ['state', 'State'],
            ['suburb_city', 'Suburb/City'],
            ['post_zip_code', 'Post/Zip Code']
        ]
    }),
    displayField: 'header',
    valueField: 'id',
    emptyText:'Search Contacts',
    typeAhead: true,
    mode: 'local',
    anchor: '40%',
    triggerAction: 'all',
    allowBlank: false,
    selectOnFocus: true,
    blankText: 'Select search type',
    listeners:{
        'select':function() {
            if (this.value == 'status') {
                //statusCombo.show();
                searchText.hide();
                $(".customerSearch").css({'margin-left':'210px','width':'auto'});
            } else {
                //statusCombo.hide();
                searchText.show();
                $(".customerSearch").removeAttr("style").css("width:auto;");
            }
        }
    }
})