title: regex for zip-code
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/578406/what-is-the-ultimate-postal-code-and-zip-regex">What is the ultimate postal code and zip regex?</a>  </p>
  </blockquote>
  
  
  
  <p>I need Regex which can satisfy all my three condtions for zip-code.  E.g- </p>
  
  <ol>
  <li>12345 </li>
  <li>12345-6789</li>
  <li>12345 1234</li>
  </ol>
  
  <p>Any pointers and suggestion would be much appreciated. Thanks !</p>