var pageTracker = null;
var TrackURL = function(url) { 
    if (pageTracker != null)
        pageTracker._trackPageview(url);
        
    return true;
}

var TrackEvent = function(category, action, optional_label, optional_value) { 
    if (pageTracker != null)
        pageTracker._trackEvent(category, action, optional_label, optional_value);
        
    return true;
}