fastselect clear select
<div id="fastSelectWrapper">
<select class="multipleSelect" multiple name="language">
<option value="All">Select ALL</option>
<option value="Bangladesh">Bangladesh</option>
<option selected value="Barbados">Barbados</option>
<option selected value="Belarus">Belarus</option>
<option value="Belgium">Belgium</option>
</select>
</div>
<script>
// to remove all
$("#fastSelectWrapper .fstChoiceRemove").click();
</script>