Changing filebrowser url without destroying ckeditor

Hello,
I'm writing a form which have some select fields and textarea(ckeditor).
When user changes select fields, filebrowserurl should change(adding some values to querystring).
I wrote that:

<select id="type">
    <option value="1">type 1</option>
    <option value="2">type 2</option>
</select>
<textarea id="Description"></textarea>

CKEDITOR.replace('Description',{filebrowserBrowseUrl : '/path/to/browser.php'});

$("#type").on("change",function(){
    var t = $(this).val();
    CKEDITOR.instances.Description.destroy();
    CKEDITOR.replace('Description',{filebrowserBrowseUrl : '/path/to/browser.php?type=' + t});
});

Is that the right way? Is there any more optimized way to do that?

You can find full example here:
http://jsfiddle.net/rq6hG/

Thanks for reply