Sort a JavaScript array that has key values

arrayKeySort.js

Array.prototype.keySort = function(key, sort){
	this.sort(function(a, b) {
		if (sort == 'desc') {
			var result = (a[key] < b[key]);
		} else if (sort == 'asc') {
			var result = (a[key] > b[key]);
		}
		return result ? 1 : -1;
	});
	return this;
}

dataArray.keySort('OrderID', 'asc');    //USAGE
dataArray.keySort('OrderDate', 'desc'); //USAGE