dontConfirmPasswords.jquery.js

// jQuery Plugin: Don't Confirm Passwords
//
// This marginally useful plugin might be helpful if you don't want to make users type password twice,
// but can't change the backend. The server still gets two password values.
//
// 1. This should unobtrusively hide a confirm password field and update its value based on the password field.
// 2. It assumes HTML of the following sort:
//
//  <fieldset>
//  <ul id="password-wrapper">
//    <li>
//      <label for="choose-password">Choose a password</label>
//      <input name="password" type="password" id="choose-password">
//    </li>
//    <li>
//      <label for="confirm-password">Confirm your password</label>
//      <input name="passwordConf" type="password" id="confirm-password">
//    </li>
//  </ul>
// </fieldset>  

(function( $ ){
  $.fn.dontConfirmPasswords = function() {
    return this.each(function() {

      var $container     = $(this),
          $pw_container  = $(this).children(":first"),
          $cpw_container = $(this).children(":last").hide(),
          $pw_field      = $pw_container.children("input[type=password]:first"),
          $conf_pw       = $cpw_container.children("input[type=password]:last");

      $pw_field.bind("change keyup", function() {
        $conf_pw.val( $(this).val() );
      });

    });
  };
})( jQuery );
$(document).ready(function(){
  $("#password-wrapper").dontConfirmPasswords();
});