title: only allow English characters and numbers for text input
body: <p>Live Demo: <a href="http://jsfiddle.net/thisizmonster/DveuB/" rel="noreferrer">http://jsfiddle.net/thisizmonster/DveuB/</a></p>
  
  <p>How can I change this so that the input only allows the characters A-Z, a-z, 0-9 while typing, without using a regular expression?</p>