gistfile1.js

// fixing The Mysterious Firefox setTimeout "Lateness" argument™
// by paul irish

// detail: http://benalman.com/news/2009/07/the-mysterious-firefox-settime/


// "feature" test
void setTimeout(function(){
  if (arguments.length==1){  // bad mozilla!, bad!
    
    // now, we fix
    (function(){ 
      var old = window.setTimeout;
      window.setTimeout = function(func,delay){

         var args = Array.prototype.slice.call(arguments,2,arguments.length);

         return old.call(window,function(){
            func.apply(window,Array.prototype.slice.call(args));
         },delay);
      }
    })();
  }
},0)


// Does it work?

// because the feature test is asynchronous, this will probably fail 
//   if immediately executed afterwards. 
// if you sniffed for firefox/gecko instead of feature testing, this
//   would be synchronous and this test would immediately pass

setTimeout(function(){
  console.log('is setTimeout normalized now?',arguments.length==3);
},4,'true',false,5)