Javascript realizes the function of remembering user name and password when logging in

Without saying much, please look at the code:

 　　 <script type="text/javascript">
  $(document).ready(function () {
   $("#UserAccount").focus();
   // Remember the username and password 
   $('#remebers').click(function () {
    if ($("#UserAccount").val() == "") {
     alert(" User name cannot be empty! ");
    }
    if($("#UserPassword").val() == "")
    {
     alert(" Password cannot be empty! ");
    }
    else {
     if ($('#remebers').attr("checked")) {
      setCookie("uname", $("#UserAccount").val(), 60);
      setCookie("upwd", $("#UserPassword").val(), 60);
     }
     else {
      delCookie("uname");
      delCookie("upwd");
     }
    }
   });
   if (getCookie("uname") != null)
   {
    $('#remebers').attr("checked", "checked");
    $('#UserAccount').val(getCookie("uname"));
    $('#UserPassword').val(getCookie("upwd"));
   }
  })
  // Write cookies
  function setCookie(name, value) {
   var Days = 30;
   var exp = new Date();
   exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
   document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
  }
  // Read cookies 
  function getCookie(name) {
   var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
   if (arr = document.cookie.match(reg)) return unescape(arr[2]);
   else return null;
  }
  // Delete cookies 
  function delCookie(name) {
   var exp = new Date();
   exp.setTime(exp.getTime() - 1);
   var cval = getCookie(name);
   if (cval != null) document.cookie = name + "=" + cval + ";expires=" + exp.toGMTString();
  }
 </script>
 　　 <div class="main">
     <section id="login_form">
      @using (Html.BeginForm("Login", "Account", new { ReturnUrl = ViewBag.ReturnUrl }, FormMethod.Post))
      {
       @Html.AntiForgeryToken()
       @Html.ValidationSummary(true)
       <table>
        <tr>
         <td align="right"> Account number: </td>
         <td align="left"><input type="text" id="UserAccount" name="UserAccount" /> @Html.ValidationMessageFor(m => m.UserAccount)</td>
        </tr>
        <tr>
         <td align="right"> Password: </td>
         <td align="left">
          <input type="password" id="UserPassword" name="UserPassword" />
@Html.ValidationMessageFor(m => m.UserPassword)
         </td>
        </tr>
        <tr>
         <td></td>
         <td align="left">
          <input name="remebers" id="remebers" type="checkbox" />
          <span style="color:#4a4949"> Remember the username and password </span>
         </td>
        </tr>
        <tr>
         <td></td>
         <td align="left">
          <input type="submit" name="submit" id="submit" value="" style=" background: url(../../Images/Login/login_submit.jpg) no-repeat; height: 25px; width: 59px; " />
          &nbsp;
          <input type="reset" name="reset" id="reset" value="" style="background: url(../../Images/Login/login_reset.jpg) no-repeat; height: 25px; width: 59px; " />
         </td>
        </tr>
       </table>
      }
     </section>
     <div class="note">
      *  Do not save login information in public; <br />
      *  In order to ensure the security of your account, please log off when you log out of the system 
      <span id="msg_tip"></span>
     </div>
    </div>