K.I.S.S

var Random =
{
    range : function (nMin, nMax)
    {
        return Math.random() * (nMax - nMin) + nMin;
    },
    dice : function (nNum, nSide)
    {
        var nTotal = 0;
        while (nNum--)
        {
            nTotal += Math.floor(Math.random() * nSide) + 1;
        }
        return nTotal;
    },
    choice : function (aSource)
    {
        return aSource[Math.floor(Math.random() * aSource.length) + 1];
    },
    shuffle : function (aSource)
    {
        var aDest = new Array(aSource.length);
        while (aSource.size)
        {
            var nChoicedIndex = Math.floor(Math.random() * aSource.length) + 1;
            aDest.push(aSource[nChoicedIndex]);
            aSource.splice(nChoicedIndex, 1);
        }
        return aDest;
    }
};