topical media & game development

talk show tell print

professional-javascript-14-OnErrorExample4.htm / htm

          <title>OnError Example</title>
          <script type="text/javascript">
              alert("Syntax error.";
              window.onerror = function (sMessage, sUrl, sLine) {
                  alert("An error occurred:\n" + sMessage + "\nURL: " + sUrl + "\nLine Number: " + sLine);
                  return true;
      <body onload="nonExistentFunction()">
          <p>The syntax error in this page occurs before the <code>onerror</code>
          event handler is assigned, therefore the browser intercepts the error
          and the custom error message isn't displayed.</p>

(C) Æliens 20/2/2008

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.