CVE-2013-2729 clean function to decode images

function sRi(x)
{
    var s = [];
    var z = x.replace(/[^\/\d]/g, ''); //hCS(j3);
        z = z.replace(/[\/]/g, ','); //hCS(pg);
    var ar = eval("[" + z + "]");

    for (var i = 0; i < ar.length; i ++)
    {
    var j = ar[i];
    if ((j >= 33) && (j <= 126))
    {
        s[i] = String.fromCharCode(33 + ((j + 14) % 94));
    }
    else
    {
        s[i] = String.fromCharCode(j);
    }
    }
    return s.join('');
}