title: How do the words in the search append as in Google
body: <p>I write "video "
  and I is added to the drop-down list:</p>
  
  <pre><code>video converter  
  video saver 
  video player
  </code></pre>
  
  <p>Ho do this?
  I just know that every time the asp.net page reloads, but I need without overloading.</p>