Disable browser 'Save Password' functionality

<form id="loginForm" action="login.cgi" method="post" autocomplete="off">

$('#loginForm').attr('autocomplete', 'off');

<input type="text" id="username" name="username"/>
<input type="password" id="password" name="password"/>

<form id="theForm" action="/your/login" method="post">
  <input type="hidden" id="hiddenUsername" name="username"/>
  <input type="hidden" id="hiddenPassword" name="password"/>
  <input type="submit" value="Login"/>
</form>

<script type="text/javascript" language="JavaScript">
  $("#theForm").submit(function() {
    $("#hiddenUsername").val($("#username").val());
    $("#hiddenPassword").val($("#password").val());
  });
  $("#username,#password").keypress(function(e) {
    if (e.which == 13) {
      $("#theForm").submit();
    }
  });
</script>

$(function() {
$('#PasswordEdit').attr("autocomplete", "off");
setTimeout('$("#PasswordEdit").val("");', 50);
});

...
<form action="url" method="post">

<!-- prevent autopaste { -->
<div style="display: none;">
   <input name="l" type="text" />
   <input name="p" type="password" />
</div>
<!-- } -->

    <table>
        <tr>
            <td>signup_nick</td>
            <td><input name="login" type="text" value=""/></td>
...