euler problem5.html

<div>problem5 (10) = <p id="a10"></p></div>
<div>problem5 (20) = <p id="a20"></p></div>
<script>
function problem5 (x) {
  var primes = [];
  for(i = 2; i < x; i++) {
    var isPrime = true;
    for(j = 0; j < primes.length; j++) {
      if(i % primes[j] == 0)
        isPrime = false;
    }
    if(isPrime) {
      primes.push(i); }
  }
  var result = 1;
  for(i = 0; i < primes.length; i++) {
    var p = primes[i];
    result *= Math.pow(p, Math.floor(Math.log(x) /Math.log(p)));
  }
  return result;
}
document.getElementById("a10").innerHTML = problem5(10);
document.getElementById("a20").innerHTML = problem5(20);
</script>