I go to a website that has a javascript based timeout and I was wondering if there was a way (using a Greasemonkey script?) that I could either disable the timer or significantly increase the timeout value. Below are the relevant parts of the html on the page...

Code HTML4Strict:
<script language="JavaScript">
var timeout = 600*1000;
var btimd = timeout + 5000;
var tOF = '';
function lOut() {
location.href = 'http://www.somewhere.com'
function timedOut() {
tOF = setTimeout('lOut()',btimd);

The most promising thought I've had is setting up a Greasemonkey script that basically runs "clearTimeout(tOF)" but that does not work, perhaps I cannot reference "tOF".

Do you have any thoughts on where to go from here?