How to replace part of one text field with a value from another text field in jQuery?
<p>I am trying to use jQuery to update a URL (in a text field) dynamically based on the user typing a value in another field.</p>

<p>Here's what I've got so far: <a href="http://jsbin.com/isiqus/10/edit" rel="nofollow">http://jsbin.com/isiqus/10/edit</a></p>

<p>It works for the first trigger of the keyup event, but not on subsequent keyups. Can anybody tell me where I am going wrong (I'm just getting to grips with jQuery).</p>
