title: Serializing a data object AND a form field for $.ajax
body: <p>If I do something like this</p>
  
  <pre><code>$.getJSON('/server/validate_field', { what:'validate', email_address:field.serialize() },     function(data)
  </code></pre>
  
  <p>then the query string ends up like this</p>
  
  <pre><code>validate_field?what=validate&amp;email_address=email_address%3Dasdk%2540lal.com
  </code></pre>
  
  <p>Notice the duplicate. How can I fix this without having to manually create a key value pair for the form data?</p>