Shuffle an array in Javascript

Given an array, shuffle each element in the array and returns the shuffled array.

function shuffle(arr)
	var arrSize = arr.length;	// array size
	var randomIndex;			
	var temp;					// temperary variable for swapping purpose
	for(var i=arrSize-1; i>=0; i--)	// Loop through the array from tail to head
		randomIndex = Math.floor(Math.random()*i); // Get a random index from the remaining unprocessed index
		// These 3 lines are doing the swap
		temp = arr[i];
		arr[i] = arr[randomIndex];
		arr[randomIndex] = temp;

	return arr; // Return the shuffled array

Demo, Given array: 1,2,3.3,4,5,6,7 Shuffled array:

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