// simple array store
    var store = new Ext.data.SimpleStore({
        fields: ['numero'],
        data : numeros // from states.js
    });
    var combo = new Ext.form.ComboBox({
        store: store,
        displayField:'numero',
        valueField: 'numero',
        editable:false,
        typeAhead: true,
        mode: 'local',
        triggerAction: 'all',
        selectOnFocus:true,
        lazyRender:true,
        listClass: 'x-combo-list-small'
       // applyTo: 'local-states'
    });