//Make sure we have an Array.reduce() function.
if (!Array.prototype.reduce) {
	Array.prototype.reduce = function(callbackfn, initVal) {
		"use strict";
		var arr = this,
			arrLen = arr.length,
			k = 0,
			accumulator = initVal === undefined ? undefined : initVal;

		for(;k < arrLen;k++) {
			if (accumulator !== undefined && k in arr) {
				accumulator = callbackfn.call(undefined, accumulator, arr[k], k, arr);
			} else {
				accumulator = arr[k];
			}
		}
		return accumulator;
	};
}