title: How to allow only some specific chars in a string with jQuery
body: <p>I make users input some tags. These tags should contain only chars: </p>
  
  <ul>
  <li><code>[a-z]</code></li>
  <li><code>[A-Z]</code></li>
  <li>numbers <code>[0-9]</code> </li>
  <li>and the character <code>-</code> </li>
  </ul>
  
  <p>If any other char is present, it should be removed from the string.</p>
  
  <p>Is this possible? What is the fastest way to do that?</p>