Super-optimised version of FizzBuzz

FizzBuzz.js

// Super-optimised version of FizzBuzz
var array = [];
array[3] = array[6] = array[9] = array[12] = "Fizz<br>";
array[5] = array[10] = "Buzz<br>";
array[0] = "FizzBuzz<br>";
var str = "";

for( var i=1; i<=100; ++i) {
   str += array[ i%15 ] || i + "<br>";
}

window.onload = function() {
   document.body.innerHTML = str;
}