Iframe enlargment

HTML

<iframe class="frame" iframe id="bestillframe" src="https://elverum.busgroup.no/query-form" height="280px" width="600px"></iframe>   
<div id=kilden>
Click here to enlarge the iframe
</div>

JavaScript

$(function(){
    $('#kilden').click(function(){
      $('#bestillframe').animate({'height':'320'})  
    })
});