Im working on a script where, when you click an image, it automatically enters the text "FOO BAR" into a form field. How can I make it so just "FOO" is highlighted when this text is entered? Here's my current code:

<div>
<img src="/images/file.png" name="image" onClick="sendText(document.search.q, 'FOO BAR')">
</div>

I expect the problem is in sendText(), you will need to indexOf('foo') and select it.
http://www.w3schools.com/jsref/jsref_indexOf.asp