$.extend($, {     setCookie: function(c_name, value, expiredays) {          var exdate = new Date();          exdate.setDate(exdate.getDate() + expiredays);          document.cookie = c_name + "=" + escape(value) + ((expiredays === undefined) ? "" : ";expires=" + exdate.toGMTString());     },     getCookie: function(c_name) {          if (document.cookie.length > 0) {               c_start = document.cookie.indexOf(c_name + "=");               if (c_start != -1) {                    c_start = c_start + c_name.length + 1;                    c_end = document.cookie.indexOf(";", c_start);                    if (c_end == -1) c_end = document.cookie.length;                    return unescape(document.cookie.substring(c_start, c_end));               }          }          return "";     }});