title: jquery REGEX validation for letters and Numbers onlyu
body: <p>Can any body tell me what is the Regex validation to use my textbox should take only letters and Numbers?</p>
  
  <pre><code>  var BLIDRegExpression = /^[a-zA-Z0-9]*$/;
  
      if (BLIDRegExpression.test(BLIDIdentier)) {
          alert('The BLID Identifier may only consist of letters or numbers and must be exactly five characters long.');
          return false;
      }
  </code></pre>
  
  <p>I am using this one but its not working. can anybody tell me.</p>
  
  <p>Thanks</p>