您的JavaScript能够选择 cookies 作为 cookies 存储在客户端浏览器中，只需使用此功能

Your JavaScript is able to select cookies as cookies stored at clients browser, just use this function

function getCookie(cname) {
   var name = cname + "=";
   var ca = document.cookie.split(';');

   for(var i=0; i<ca.length; i++) {
      var c = ca[i];
      while (c.charAt(0)==' ') c = c.substring(1);
      if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
   }

   return "";
}