LCG RNG

gistfile1.js

// Implements an LCG RNG.
var Random = function Random(seed) {
    this.term = (typeof seed !== 'undefined' ? seed : new Date().getTime());
    this.multiplier = 60969; // carefully chosen
    this.modulus = Math.pow(2, 32);
    this.increment = 1;
};

Random.prototype.randInt = function(range) {
    this.term = (this.term * this.multiplier + this.increment) % this.modulus;
    return this.term % range;
};