setTimeout/clearTimeout

Hey all -

I have a mouse over event that triggers a setTimeout event. I’d like to clear that event from happening if the user rollOuts of the button. I basically need to figure out how to clear my setTimeout event. Can anyone help?


bButton.onRollOver = function()
{
    _root.countdown._visible = true;
    _root.countdown.gotoAndPlay('1');
    setTimeout(function ()
    {
    ExternalInterface.call("prettyLaunch","http://bolle.com/news/official-eyewear-telluride.aspx?ie=UTF-8&oe=UTF-8&q=prettyphoto&iframe=true&width=100%&height=100%","");
    trace('time');
    },3000);






};


bButton.onRollOut = function()
{
    _root.countdown._visible = false;
    _root.countdown.gotoAndStop('1');
/*clearTimeout code here...*/


};