Entropy

function Entropy(s)
{
    var count = [];
    var buk = [];
    var i = 0;
    var j = 0;
    var u = 0;
    var t = true;
    for (i=0;i<s.length;i++)
    {
        for (j=0;j<buk.length;j++)
            if (buk[j] == s.charAt(i))
            {
                count[j]++;
                t = false;
            }
        if (t==true)
        {
            buk[buk.length] = s.charAt(i);
            count[count.length] = 1;
        }
        t = true;
    }
    var frequency = [];
    for (i = 0; i < buk.length; i++)
    {
        frequency[i] = count[i] / s.length;
    }
    var e = 0;
    for (i = 0; i < frequency.length; i++)
    {

        e -= frequency[i] * (Math.log(frequency[i]) / Math.log(2));
    }
    var e2 = 0;
    for (i = 0; i < frequency.length; i++)
    {

        e2 -= frequency[i] * (Math.log(frequency[i]) / Math.log(frequency.length));
    }
    WSH.Echo(e, e2);
}