title: Random font size and set a min and max of the character
body: <p>I have a few problems here.</p>
  
  <p>a)How to add random font size into this code?</p>
  
  <p>b)How to set the limitation of min(3) and max(8) characters?</p>
  
  <p>Javascript</p>
  
  <pre><code>function randomString(Length) {
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    for (var i = 0; i &lt; Length; i++)
      text += possible.charAt(Math.floor(Math.random() * possible.length));
    return text;
  }
  function ChangingRandomString(Length) {
    setInterval(function () {
      document.getElementById("random").innerHTML = randomString(Length);
    }, 2000);
  }
  </code></pre>