title: SCRIPT5009: 'Page_ClientValidate' is undefined
body: <p>I am getting an error when I run the code in Internet Explore 11. It works fine when I run on FF and Chrome. I also checked IE 8 on windows server 2003 server and it works.</p>
  
  <p>error SCRIPT5009: 'Page_ClientValidate' is undefined</p>
  
  <p>javascript code:</p>
  
  <pre><code>function systemValidation() {
     if (Page_ClientValidate()) { .. } }
  </code></pre>
  
  <p>any ideas why it is failing?</p>
  
  <h2>UPDATE</h2>
  
  <p>I also tried the code below and still doesnt work. so annoying..</p>
  
  <pre><code>        function validateThis() {
          if (typeof (Page_ClientValidate) === 'function') {
              var isPageValid = Page_ClientValidate('');
              if (isPageValid) {
                  alert("page valid");
                  return true;
              }
          }
          alert("page NOT valid");
          return false;
      }
  </code></pre>
  
  <p>are there any other alternatives to do the same task? </p>