function mt_rand (min, max) {
    var argc = arguments.length;
    if (argc === 0) {        min = 0;
        max = 2147483647;
    } else if (argc === 1) {
        throw new Error('Warning: mt_rand() expects exactly 2 parameters, 1 given');
    }    return Math.floor(Math.random() * (max - min + 1)) + min;
}