Make checkbox value append to textbox, separated by semicolon (copy e-mail addresses)
<p>I'd like to have a list of checkboxes (e-mail addresses). When boxes are clicked, a textfield blanks and is replaced with values of all checked checkboxes, only separated by "; ".</p>

<p><a href="http://jsfiddle.net/7b5fk/1/" rel="nofollow">http://jsfiddle.net/7b5fk/1/</a> is -almost- what I want, except I don't want the comma spacing. I've tried multiple approaches but still can't get rid of the comma.</p>
