引用jquery-1.9.1.js以上

(function ($) {
    $.fn.togglePassword = function (options) {
        var s = $.extend($.fn.togglePassword.defaults, options),
            input = $(this);

        $(s.el).bind(s.ev, function () {
            "password" == $(input).attr("type") ?
                $(input).attr("type", "text") :
                $(input).attr("type", "password");
 
            if ($(this).hasClass("image-eye-open")) {
                $(this).addClass("image-eye-close").removeClass("image-eye-open");
            }
            else {
                $(this).addClass("image-eye-open").removeClass("image-eye-close");
            }
        });
    };

    $.fn.togglePassword.defaults = {
        ev: "click"
    };
}(jQuery));

///CSS
//.image - eye - close { background: url("../img/clear_icon_eye_close.png"); height: 20px; width: 20px; display: block; background - size: 20px 20px; background - repeat: no - repeat; position: absolute; right: 10px; top: 25 %; cursor: pointer; }
 
//.image - eye - open { background: url("../img/clear_icon_eye_open.png"); height: 20px; width: 20px; display: block; background - size: 20px 20px; background - repeat: no - repeat; position: absolute; right: 10px; top: 25 %; cursor: pointer; }

使用

<input class="txtPasswordOK" id="txtPasswordOK" type="password"
                               autocomplete="off" placeholder="输入确认密码" />
<label class="image-eye image-eye-close"></label>

$(function () {
 
          $('#txtPasswordOK').togglePassword({
              el: '.image-eye'
          });
      });