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professional-javascript-08-login.htm / htm

          <script type="text/javascript" src="detect.js"></script>
          <script type="text/javascript">
              window.onload = function () {
                  if ((isMinIE5_5 && isWin) || (isMinMoz1 && isUnix) 
                     || (isMinSafari1 && isMac)) {
                    document.getElementById("divLogin").style.visibility = "visible";
                    document.getElementById("divError").style.visibility = "hidden"
          <form method="post" action="DoLogin.jsp">
              <div style="border: 2px dashed blue; background-color: #dedede; height: 300px; padding: 10px">
                  <div id="divError" style="position: absolute; left: 20px; top: 100px; ">
                      This Web application requires one of the following:
                          <li>Internet Explorer 5.5 or higher for Windows</li>
                          <li>Mozilla 1.0 or higher for Unix</li>
                          <li>Safari 1.0 or higher for Macintosh</li>
                        <p>This Web application also requires JavaScript (if you are using one of the above browsers, make sure that JavaScript is enabled).</p>
                  <div id="divLogin" style="position: absolute; left: 20px; top: 100px; visibility: hidden">
                      <table border="0" width="100%" height="100%"><tr><td align="center">
                      <table border="0">
                              <td>Username:</td><td><input type="text" name="txtUsername" /></td>
                              <td>Password:</td><td><input type="password" name="txtPassword" /></td>
                              <td>&nbsp;</td><td><input type="Submit" value="Login" /></td>

(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.