title: Searching for NetBIOS name HTML input pattern
body: <p>I want to add a pattern to one of my input tags, which checks, if the given input by the user is a correct NetBIOS name.</p>
  
  <p>NetBIOS names can have a maximum amount of 15 characters. It can contains numbers and JUST upper case letters...</p>
  
  <p>I've tried to solve this problem with the following code, but it does not work:</p>
  
  <pre><code>    pattern="/([A-Z0-9]{1,15})/"
  </code></pre>
  
  <p>Can somebody help?</p>