title: Regex pattern if string contains characters
body: <p>Sorry for being an absolute beginner, when it comes to Javascript and Regex, </p>
  
  <p>I have a Codepen: <a href="http://codepen.io/anon/pen/dNJNvK" rel="nofollow noreferrer">http://codepen.io/anon/pen/dNJNvK</a></p>
  
  <p>What I want to accomplish is to validate, if a String contains some special UTF-8 characters. That's why I work with RegExp. The pattern I have here will return false only if the string to test equals one of the characters. But I want to return false if it contains one of these characters.</p>
  
  <p>How can I accomplish this, I know it should be quite easy, but I wasn't able to get it working.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>var regEx = new RegExp('[\u0001-\u00FF]');
  
  console.log("This should be true: " + regEx.test("Tes"));
  console.log("This should be false: " + regEx.test("Tes�"));
  
  console.log("This returns false, because the string equals a special character: " + regEx.test("�"));</code></pre>
  </div>
  </div>
  </p>