javascript: console.log proxy

/*
	This is a proxy function to minimize console.log
	output on production server. It creates non-existant
	window.console Object for old browsers, and defers all
	log events via the proxy function.
	
	Usage:
	(on your dev server)
	window.message('kilroy was here...'); // normal output.
	(on your production server)
	window.message('kilroy was here...'); // no output. silence.
	
	Bypassing the silence:
	console.log('bypass', 1, [2 ,3, 4]); // 1st argument 'bypass' will activate console.logs
	http://blahblah.com/#debug // #debug will activate console.logs
*/
window.message = (function () {
	/* This is a proxy for console.log */
	var isProduction = true, // add your regex here
		bypassFlag = null,
		prefix = '[APP]',
		fn = function () { return; };

	if (!window.console || !window.console.log) {
		window.console = { log: fn, debug: fn, info: fn, warn: fn, error: fn };
	}

	return function (/* arguments */) {
		var bypass = (/^#debug$/gi).test(window.location.hash),
			args = Array.prototype.slice.call(arguments) || [];

		bypassFlag = bypassFlag || (args.length && args[0] === 'bypass') || bypass || false;
		args.splice(0, 0, prefix);

		if (!bypassFlag && isProduction) { return; }
		try {
			window.console.log.apply(window.console, args);
		} catch (err) {
			return;
		}
	};
}());