JS установить и получить Cookie

/**
 * Класс JS cookie www.megabit24.ru
 */
function Cookie(){
   this.get = function(name){
      var matches = document.cookie.match(new RegExp("(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"));
      return matches ? decodeURIComponent(matches[1]) : undefined;
   }
   this.set = function (name, value, expires) {
      var path = '/';
      var domain = location.hostname;
      var secure = '';
      var dat;

      if (typeof expires == "number" && expires) {
         var d = new Date();
         d.setTime(d.getTime() + expires * 1000);
         dat = d;
      }
      if (expires && expires.toUTCString) {
         dat = dat.toUTCString();
      }

      document.cookie =
         name +"=" + escape(value) +
         ((expires) ? "; expires="  + dat : "") +
         ((path) ? "; path=" + path : "") +
         ((domain) ? "; domain=" + domain : "") +
         ((secure) ? "; secure" : "")
   }
   this.del = function(name){
      this.set(name, "",1);
   }
}



Пример использования
var cookie = new Cookie();
cookie.set('backToCart','Y',1800);
cookie.get('backToCartMsg',);