var Cookie = {  
    
  key: 'cookies',  
    
  set: function(key, value) {  
   var cookies = this.getCookies();  
   cookies[key] = value;  
   var src = Object.toJSON(cookies).toString();  
   this.setCookie(this.key, src);  
  },  
    
  get: function(key){  
   if (this.exists(key)) {  
    var cookies = this.getCookies();  
    return cookies[key];  
   }  
   if (arguments.length == 2) {  
    return arguments[1];  
   }  
   return;  
  },  
    
  exists: function(key){  
   return key in this.getCookies();  
  },  
    
  clear: function(key){  
   var cookies = this.getCookies();  
   delete cookies[key];  
   var src = Object.toJSON(cookies).toString();  
   this.setCookie(this.key, src);  
  },  
    
  getCookies: function() {  
   return this.hasCookie(this.key) ? this.getCookie(this.key).evalJSON() : {};  
  },  
    
  hasCookie: function(key) {  
   return this.getCookie(key) != null;  
  },  
   
  setCookie: function(key,value) {  
   var expires = new Date();  
   expires.setTime(expires.getTime()+1000*60*60*24*365)  
   //document.cookie = key+'='+escape(value)+'; expires='+expires+'; path=/';  
   document.cookie = key+'='+escape(value)+'; path=/';  //expires at end of session
  },  
   
  getCookie: function(key) {  
   var cookie = key+'=';  
   var array = document.cookie.split(';');  
   for (var i = 0; i < array.length; i++) {  
    var c = array[i];  
    while (c.charAt(0) == ' '){  
     c = c.substring(1, c.length);  
    }  
    if (c.indexOf(cookie) == 0) {  
     var result = c.substring(cookie.length, c.length);  
     return unescape(result);  
    };  
   }  
   return null;  
  }  
 }