0004.html

<p>A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 x 99.</p>
<p>Find the largest palindrome made from the product of two 3-digit numbers.</p>
<script>
(function(){
  var i = 999, j = 999, highest = 0, palindromes = [];
  
  while (i > 0) {
    while (j > 0) {
      var pal = determinePalindrome(i * j + "");
      if (pal)
        palindromes.push(i * j);
      j -= 1;
    }
    i -= 1;
    j = 99;
  }

  function determinePalindrome(k) {
  //determine the number of pairs and loop through each pair to compare values
    for (var m = 0; m < k.length; m++){
      var first, last;
      first = k.charAt(m);
      last = k.charAt(k.length - 1 - m);
      if (first !== last)
        return false;
    }
    return true;
  }

  palindromes.sort(function(palindromes,sorted){return palindromes-sorted;});
  document.write(palindromes[palindromes.length - 1]);
})();
</script>