JQuery Bootstrap Multiselect plugin - Set a value as selected in the multiselect dropdown

//Do it simple

var data="1,2,3,4";

//Make an array

var dataarray=data.split(",");

// Set the value

$("#multiselectbox").val(dataarray);

// Then refresh

$("#multiselectbox").multiselect("refresh");

Thank you all for your answers.

Taking all of your answers as a guideline, I resolved the problem with the below code:

var valArr = [101,102];
i = 0, size = valArr.length;
for(i; i < size; i++){
  $("#data").multiselect("widget").find(":checkbox[value='"+valArr[i]+"']").attr("checked","checked");
  $("#data option[value='" + valArr[i] + "']").attr("selected", 1);
  $("#data").multiselect("refresh");
}

Thanks once again for all your support.

It's supposed to be as simple as this:

<select id='multipleSelect' multiple='multiple'>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>
<script type='text/javascript'>
    $('#multipleSelect').val(['1', '2']);
</script>

Check my Fiddle: https://jsfiddle.net/luthrayatin/jaLygLzo/