I have a form with two radio options and a text area. The first option if highlighted by default. If the user clicks or tabs (onfocus) to the text area, I want the second radio option to automatically be highlighted.

eg. two radio's named "options", values "all" and "mine" and a textarea named "emails". "all" is already highlighted. When I click on "emails", I want "mine" to be highlighted automatically.

<input type="radio" name="options" value="all" checked>
<input type="radio" name="options" value="mine">
<textarea name="emails" cols="50" rows="10">

Any help or ideas would be great.