Sample randomization script. Please note that this is not something you should use in your production code. The randomization here is by far not the most efficient manner to randomize something. It is intended to demonstrate an extreme.

#StreamingSunday 2012-03-24 Overblown randomization script

/*
* Create a shuffle array method returning the new shuffled array instead of effecting the original
*/
Array.prototype.shuffle = function () {
    for (var i = this.length - 1; i > 0; i--) {
        var randomIndex = Math.floor(Math.random() * (i + 1));
        var tmp = this[i];
        this[i] = this[randomIndex];
        this[randomIndex] = tmp;
    }

    return this;
}

/* Return a Randomized Array Item
*  Please note that there are FAR more effective and efficient ways to
*  radomize and return a value from an array. This is only meant to
*  give example of an extreme.
*
* @params	arr	myArray		= The array item to randomly choose from
*			int	randCount	= Times to randomly shuffle array
*/
var randomize_array = function(myArray, randCount){

	// Set the base current count value
    var	currentCount = 0;

	// Ensure that the random shuffle value is set
    randCount = (typeof randCount == 'number') ? randCount : 1;

	// Loop over for only the requested
	while(currentCount < randCount){
		
		// Shuffle the array
		myArray = myArray.shuffle();
		
		// Log the ransomization since most browsers will enumerate a duplicate log entry
		console.log('Radomized');
		
		// Add 1 to the current count value
		currentCount++;
		
	}
	
	// Return only the first value of the array
	return myArray[0];
};

// Sample array item
my_array = [0, 1, 2, 3, 4];

// Examples
// randomize_array(my_array, 5);
// randomize_array(my_array);
// randomize_array(my_array, 5 * 5);