title: Regex - Without Special Characters
body: <p>I'm using regex to validate username</p>
  
  <pre><code>^[a-zA-Z]+\.[a-zA-Z]{4,10}^'
  </code></pre>
  
  <p>Unfortunately it doesn't affect if the the value contains special characters such as <code>!@#$%^&amp;*)(':;</code></p>
  
  <p>I would glad to get some help for Regex that contains:</p>
  
  <ul>
  <li>Alphanumeric only (<code>a-zA-Z0-9</code>)</li>
  <li>Length between 4 - 10 characters.</li>
  </ul>