Multiple Select using jQuery
by Yatin Luthra
HTML
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<select id='multipleSelect' multiple='multiple'>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
JavaScript
$('#multipleSelect').val(['1', '2']);