My #code140 submission - a function that counts from 1 to 100, replacing multiples of 3 with 'Fizz', multiples of 5 with 'Buzz', and multiples of 3 & 5 with 'FizzBuzz'.

gistfile1.txt

(function (){
    for(i = 1; i < 101; i++) {
        if (i % 3 === 0 && i % 5 === 0) {
            console.log('FizzBuzz');
        } else if (i % 3 === 0) {
            console.log('Fizz');
        } else if (i % 5 === 0) {
            console.log('Buzz');
        } else {
            console.log(i);
        }
    }
})();