function fireEvent(element, event)
{
    if (document.createEventObject)
    {
        // dispatch for IE
        var evt = document.createEventObject();
        return element.fireEvent('on' + event, evt)
    }
    else
    {
        // dispatch for firefox + others
        var evt = document.createEvent("HTMLEvents");
        evt.initEvent(event, true, true); // event type,bubbling,cancelable
        return !element.dispatchEvent(evt);
    }
}

function LightNavButton(oNavButton)
{
    oNavButton.className = "LitButton";
}

function DimNavButton(oNavButton)
{
    oNavButton.className = "NavButton";
}