text: /* exported PasswordTextbox */
  var PasswordTextbox = function(config) {
    var $pwd     = $('<input type="password">'),
        $pwdText = $('<input type="text">'),
        $eye     = $('<div></div>'),
        $div     = $('<div class="wd-password">密码：</div>');
  
    $div.append($pwd);
    $div.append($eye);
    $div.append($pwdText);
    $(config.container).append($div);
  
    $pwd.on('input', function(){
      $pwdText.val($pwd.val());
    });
  
    $eye.mouseover(function(){
      $pwdText.css('z-index', '10');
    });
  
    $eye.mouseout(function(){
      $pwdText.css('z-index', '-10');
    });
  
    this.getPwd = function() {
      return $pwdText.val();
    };
  };
  