Javascript log function with history

history-log

window.log = function () {
  log.history = log.history || [];
	log.history.push(new Date(), arguments);
	if (this.console) {
		arguments.callee = arguments.callee.caller;
		var a = [].slice.call(arguments);
		(typeof console.log === "object" ? log.apply.call(console.log, console, a) : console.log.apply(console, a))
	}
	log.displayHistory = function() {
		for (var i=0, len=window.log.history.length; i<len; i++)
		{
			console.log(window.log.history[i]);
		}
	}
};
(function (b) {
	function c() {}
	for (var d = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,timeStamp,profile,profileEnd,time,timeEnd,trace,warn".split(","), a; a = d.pop();) {
		b[a] = b[a] || c
	}
})((function () {
	try {
		console.log();
		return window.console;
	} catch (err) {
		return window.console = {};
	}
})());