var UND="undefined";
function isUnd(a)
{return typeof a ==UND}

var CookieEngine={
Cookies:{
/*
"domain.com":{
		"/path":
				{
					"name":{value:"",expires:"",secure:""}
				}
		}
*/
},

parseURL:function(url)//ret {d:"domen.ru",p:"/path"}
	{
			//http://yandex.ru/dir/index.html
			//http(s?):\/\/([^\/:]+)(?::(\d+))?((?:(?:\/[\d\wа-я._-]*)*)\/)?
		if (/http(s?):\/\/([^\/?:]+)(?::(\d+))?((?:\/[\wа-я.=_-]*)*)/i.test(url))
		{
			return {s: (RegExp.$1 ? true : false), port:( RegExp.$3 ? RegExp.$3 : (RegExp.$1 ? 443 : 80) ) ,d: "." + RegExp.$2, p: RegExp.$4 || "/"}
		}
		return null;
	},
DelCookie:function(name, path, domain)
	{
	 if (isUnd(name)  ||
		 isUnd(path)  ||
		 isUnd(domain) )
		 return null;
	 else delete this.Cookies[domain][path][name];
	 return this;
	},
GetCookie:function(name, path, domain)
	{
	 if (isUnd(name)  ||
		 isUnd(path)  ||
		 isUnd(domain)||
		 isUnd(this.Cookies[domain]) ||
		 isUnd(this.Cookies[domain][path]) ||
		 isUnd(this.Cookies[domain][path][name]) )
		 return "";
		var coo=this.Cookies[domain][path][name];
	    var now=new Date();
		now.setMinutes(now.getMinutes()+now.getTimezoneOffset())
		if(now > coo.expires && coo.expires!=1) //устарела и не текущая сесия
		{
				this.DelCookie(name, path ,domain)
				return "";
		}
		
		return coo.value;
	},
SetCookie:function(name, value, path, domain, expires, secure)
	{
		 if(isUnd(name)||
			isUnd(path) ||
			isUnd(domain))
			 return null;
		 if (typeof expires=="string")
		 {
		   //Fri, 18-Mar-2011 20:32:35 GMT
		   //Mon, 01-Jan-1990 00:00:00 GMT
		   //Thu, 31-Dec-37 23:55:55 GM
			expires	= expires.replace(/-/g," ").replace(/([a-zA-Z]{3} )(\d{1,3}) /i,
				function(c,b,a){
				  var L=a.length;	
				  return b + (L==3 ? "2" : (L==2 ? "20":"200")) + a + " ";
				} );//тут нада поработать над парсингом даты
			//log("@@expires: "+expires)
			expires=new Date(expires)
		 }
		 else if( !(expires.getDate)) //не время
		 {
			 expires=1;//текущая сессия

		 }//else expires имеет тип дейт
		 
		 secure=secure ? true : false;
		 if (!this.Cookies[domain])
			this.Cookies[domain]={};
		 if (!this.Cookies[domain][path])
			this.Cookies[domain][path]={};

		 this.Cookies[domain][path][name]={"value":value, "expires": expires ,"secure": secure}
		 return this;

	},
Clear:function( domen, path)
	{
		if (!isUnd(domen))
		{
			if (!isUnd(path))
			{
				delete this.Cookies[domen][path]
			}
			else{ delete this.Cookies[domen]}
		}
		else this.Cookies={};
		return this;
	},
parseSetCookie:function(url,s)//парсит одну сет куку
	{
		if (isUnd(s) || isUnd(url) || !(url=this.parseURL(url)))
		{
			return this;	
		}
		var coo={
				domain:	 url.d,
				path:	 url.p,
				secure:	 false,
				expires: 1 //1 - значит хранить до конца текущей сесии
				};//coo
		s=s.split(/;\s*/);
		var nv = s[0].split(/\s*=\s*/);
		var name = decodeURIComponent(nv[0]);
		var value = decodeURIComponent(nv[1]);
		for (var i=1;i<s.length;i++)
		{
			nv=s[i].split(/\s*=\s*/)
			var cn=decodeURIComponent(nv[0].toLowerCase())
			coo[cn]= (typeof nv[1] != UND )? decodeURIComponent(nv[1]) : true;
		}//for
		//L("<hr><pre> url = "+Dumper(url)+"<\/pre><pre> coo="+Dumper(coo)+"<\/pre>")
		//ToDo: добавить проверку  Что coo.domain == url.d или coo.domain есть поддомен url.d
		this.SetCookie(name, value, coo.path, coo.domain, coo.expires, coo.secure);//name, value, path, domain, expires, secure

		return this;
	},
toHttpHeader:function(u)//u = url //ret String
	{
		if (!isUnd(u))
		{
			u=this.parseURL(u);//ret {d:"doem",p:"path"}
		}
		else return "";//ошибка не задан урл
		var r="",v;
		//var d=this.Cookie[u.d];
        for (var d in this.Cookies)
        {  //0123456789
		   //www.aa.com
		   //    aa.com
		   //L(d)
		   var Li=u.d.lastIndexOf(d);
		   if (Li > -1 && Li+d.length==u.d.length)
		   {//L(d)
			for (var p in this.Cookies[d])
			 {//L(p)
				if (u.p.indexOf(p)==0)//есть совпадение пути
				{//L(p)
					for (var n in this.Cookies[d][p])
					{//L(n)
						if (v=this.GetCookie(n, p, d))
						{//L(v)
							r+= ( r.length > 0 ? "; " : "" )+ n+"="+encodeURI(v)
						}//if
					}//for
				}//if
			 }//for
		   }//if
        }//for
	     return r;
	}//httpheader


}//cookieman

function CookieManager()
{
	//return this;
}

CookieManager.prototype=CookieEngine;

 <head>
  <title>Тестим куки менеджер</title>
	<script type="text/javascript"  charset="utf8" src="CookieManager.js"></script>
 </head>

 <body>
  <h1>Тестим куки менеджер</h1>
  <script type="text/javascript">
    function L(t){document.write("<pre>"+t+"<\/pre>")}

	var url="https://ya.ru/doom/page.html?aasd=21321"
	var coo="email=papa@ya.ru; domain=ya.ru; path=/doom/page.html; expires=Fri, 18-Mar-2012 20:32:35 GMT; "
	var C=new CookieManager()
	L("["+C.toHttpHeader(url)+"]")
	C.parseSetCookie(url,coo)

	L("[ "+"https://ya.ru/" +" : "+C.toHttpHeader("https://ya.ru/")+"]")
	L("[ "+url +" : "+C.toHttpHeader(url)+"]")
 
  </script>
 </body>

div>span.headers[0]