title: how to do a postback and get value from my html in that postback
body: <p>I have a js function</p>
  
  <pre><code>function(id){
  // do a postback here and get the id on the server side  
  }
  </code></pre>
  
  <p>I need to send the <strong>id</strong> to the server, how could I do this?</p>
  
  <p>any way will do, using additional/hidden controls anything </p>