ArrayForEachPolyfill.js

if (Array.prototype.forEach != undefined) {
	// Array->forEach exists... no polyfill necessary
	console.log("Array->forEach exists. No PolyFill necessary!");
} else {
	// Array->forEach does not exist... polyfill necessary
	console.log("Array->forEach does not exist. Resorting to PolyFill!");
	Array.prototype.forEach = function(callback, thisArg) {
		if (typeof(callback) !== 'function') {
			throw new TypeError(callback + ' is not a function!');
		}

		var len = this.length;

		for (var i = 0; i < len; i++) {
			// callback goes here...
			callback.call(thisArg, this[i], i, this);
		}
	}
} // Array->forEach should now exist one way or another...