title: Regex for simple urls
body: <p>I am looking for regex for simple URLs as </p>
  
  <ul>
  <li><code>http://www.google.com</code></li>
  <li><code>http://www.yahoo.in</code></li>
  <li><code>http://www.example.eu</code> </li>
  <li><code>http://www.example.net</code></li>
  <li>etc. </li>
  </ul>
  
  <p>No subdirectories allowed. For example in this cases it must not validate <code>http://www.google.com/</code>, <code>http://www.yahoo.in/mail</code>. </p>
  
  <p>Does anyone know any regex to do this?</p>