Display similar topics on creation of a new topic

Code:

/\?f=\d+&mode=newtopic/.test(window.location.search) && $(function() {
  var s = document.getElementsByTagName('INPUT'),i;
  for (i=0; i<s.length; i++) {
    if (/subject/.test(s[i].name)) {
      var d = document.createElement('DIV');
      d.innerHTML = '<div class="h3">Similar Topics</div><div id="topicSimilar">No similar topics..</div>';
      s[i].parentNode.appendChild(d);
      s[i].onkeyup = function() {
        if (this.value.length > 3) $('#topicSimilar').load('/search?search_keywords='+encodeURIComponent(this.value)+' a.topictitle', function() {
          $(this).find('a').attr({'target' : '_blank', 'style' : 'display:block'});
        });
        else $('#topicSimilar').html('No similar topics..');
      }
    }
  }
});

Michael_vx wrote:  
seems not working on my testing forum to test codes
i wonder if there something missing

Ange Tuteur wrote:I doubt it would take, but it's a neat idea. You can do the same with search and show results as you type.

I think someone did that before with the search though.