gistfile1.js

// definition of trackEvent method on a global object

$3N = {
  trackEvent : function(category, action, label, value){    
    if (typeof(pageTracker) == "object") pageTracker._trackEvent(category, action, label, value);
    else if(typeof(_gaq) == "object") _gaq.push(['_trackEvent', category, action, label, value]);
  }
};


// example of using trackEvent in my onerror helper (which you may also want to use)

window.onerror = function(msg, url, linenumber){   
	var handle_error = function(msg, url, linenumber) {
		$3N.trackEvent(
      "Error",
      msg,
      navigator.userAgent,
      linenumber
    );		
	};

	if ($3N.dom_ready) 
          handle_error(msg, url, linenumber);
	else
          window.addEvent('domready', handle_error.bind(window, [msg, url, linenumber]));
};

window.addEvent('domready', function() { $3N.dom_ready = true; });