난장로그

var Cookies={set:function(n,v,d){var g="";if(d!=undefined){var f=new Date();f.setTime(f.getTime()+(d*24*60*60*1000));g="; expires="+f.toGMTString();};document.cookie=escape(n)+"="+escape(v||'')+g;},get:function(n){var a=n+"=";var r=null;document.cookie.split(';').each(function(s){while(s.charAt(0)==' ')s=s.substring(1,s.length);if(s.indexOf(a)==0)r=s.substring(a.length,s.length);});return r;},remove:function(n){this.set(n,'',-1);return this.get(n)||true;}};

RequireMent
Prototype Framework (http://www.prototypejs.org)

Usage
Cookies.set(name, value, expired date);
Cookies.get(name);
Cookies.remove(name);