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>