function createCookie(name,value,days) {      if (days) {          var date = new Date();          date.setTime(date.getTime()+(days*24*60*60*1000));          var expires = "; expires="+date.toGMTString();      }      else var expires = "";      document.cookie = name+"="+value+expires+"; path=/";  }    function readCookie(name) {      var nameEQ = name + "=";      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,c.length);          if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);      }      return null;  }    function eraseCookie(name) {      createCookie(name,"",-1);  }