Check this: <http://jsfiddle.net/nDmjt/5/>

```
$("#button").on("click", function () {
var res =  multiselect.value().slice();
    res.push('customerStatusIds:25');
    res.push('priorityIds:1');

    multiselect.dataSource.filter({});
    multiselect.value(res) 

}); 

```

Do you have any idea on how can I achieve the same behaviour using angular js ? Thanks in advance.