The global function window.either() picks and returns a random entry from its arguments. It will also combine the values of any arrays passed to it together and return a random entry from the total set.
Single Array Example
// Returns 1, 2, or 3
either([1,2,3]);
Multiple Arguments Example
// Returns 1, 2, or 3
either(1,2,3);
Multiple Array Arguments Example
// Returns 1, 2, or 3
either([1],[2],[3]);