Array Shuffle

var array = ["one", "two", "three", "four", "five"];

document.writeln(array + "<br />");

var newArray = shuffle(array);

document.writeln(newArray);

function shuffle (arr) {
    var copy = arr.concat(),
        shuffled = copy;

    for (var i = 0; copy[i]; i++ ) {
        var j = i,
            temp;
        while (j === i) {
            j = Math.floor(Math.random()*copy.length);
        }
        temp = copy[i];
        copy[i] = shuffled[j];
        shuffled[j] = temp;
    }
    return shuffled;
}