I would like to programmatically open the picker for the select element below.

<select id="select1" multiple="multiple">
  <option value="MDO1" selected="selected">MDO 1</option>
  <option value="MDO2">MDO 2</option>
  <option value="MDO3">MDO 3</option>
</select>

I'm trying to do this on Android inside a WebView. I have tried creating and dispatching touchstart and touchend events to the select like this

      var select1 = document.getElementById("select1");
      var evt = document.createEvent('TouchEvent');
      evt.initUIEvent('touchstart', true, true);
      select1.dispatchEvent(evt);
      var evt2 = document.createEvent('TouchEvent');
      evt2.initUIEvent('touchend', true, true);
      select1.dispatchEvent(evt2);

but that didn't do anything. What type of event do I need to fire to get the picker popup to show up?