Javascript to Select Multiple options [closed]

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A pure javascript solution

<select id="choice" multiple="multiple">
  <option value="1">One</option>
  <option value="2">two</option>
  <option value="3">three</option>
</select>
<script type="text/javascript">

var optionsToSelect = ['One', 'three'];
var select = document.getElementById( 'choice' );

for ( var i = 0, l = select.options.length, o; i < l; i++ )
{
  o = select.options[i];
  if ( optionsToSelect.indexOf( o.text ) != -1 )
  {
    o.selected = true;
  }
}

</script>

Although I agree this should be done server-side.

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