Cookie = {
    create: function(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=/";
    },
    read: function(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;
    },
    erase: function(name) {
      createCookie(name,"",-1);
    }
 };