Javascript Array Shuffle

array-shuffle.js

Array.prototype.shuffle = function() {
	    var input = this;
	     
	    for (var i = input.length-1; i >=0; i--) {
	     
	        var randomIndex = Math.floor(Math.random()*(i+1)); 
	        var itemAtIndex = input[randomIndex]; 
	         
	        input[randomIndex] = input[i]; 
	        input[i] = itemAtIndex;
	    }
	    return input;
	};