title: jQuery autocomplete validation
body: <p>I am using the jQuery autocomplete to with a list of 800 values</p>
  
  <pre><code>    j$(function() {
      var availableTags = [item1,item2, item3,...];
      j$( "#stdcodes" ).autocomplete({
      source: availableTags
      });
  });
  </code></pre>
  
  <p>This works fine, what i want to do is limit or validate that the input in one the autocomplete values.</p>
  
  <p>Can anyone help with this?</p>