<table id="example1" class="table table-bordered table-striped" ng-table="tableParams" show-filter="isFiltersVisible">
  <colgroup>
    <col width="5%"/>
    <col width="5%"/>
  </colgroup>
  <tr>
    <td>
      <select ng-change="changed()"
        ng-model="regions"
        ng-options="data.name for data in options">
      </select>
    </td>
    <td colspan='3'>
      <input type='button' name='go' value='Go' class='btn btn-primary' ng-click="performAction()">
    </td>
  </tr>
</table>