Use this function to randomly ruin a array by splitting it up and inserting those chunks in random places.

arrayruiner.js

function randomlySplitArray(inputarray, chunksize, numofloops) {
    function randomint(min, max) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
    var temparray = inputarray;
    for (var q = 0; q < numofloops; q++) {
        var start = randomint(0, inputarray.length - chunksize);
        var othertemp = temparray.splice(start, chunksize);
        var index = randomint(0, temparray.length - chunksize - 1);
        // https://stackoverflow.com/questions/7032550/javascript-insert-an-array-inside-another-array
        temparray = temparray.slice(0, index).concat(othertemp).concat(temparray.slice(index));
    }
    return temparray;
}