Array: Shuffle

Array.prototype._shuffle = function() {
	/*
	*  This replaces original array and does not return a value
	*/
 
	var ary_length = this.length;
	for (var i=0; i < ary_length; ++i) {
		var randomize = Math.floor(Math.random()*ary_length);
		var temp = this[i];
		this[i] = this[randomize];
		this[randomize] = temp;
	}
	return this;
}// End Function