title: Verifying additional parameter with j-security-check
body: <p>I have implemented web application login using <code>j-security-check</code> which accepts parameters <code>j_username</code> and <code>j_password</code> for authentication with background registry. Now, I need to add date of birth as one more parameter and need to authenticate the user with this parameter too.</p>
  
  <p>Is there a way to extend j-security-check to accept additional parameters?
  I would like to avoid performing the check in a servlet filter, if possible.</p>
  
  <p>Using WebSphere V8, MyFaces JSF 2.0, Servlet 3.0, Custom database based authentication</p>