// cookie array

 function getCookieArrayByStr(str)

 {

     var cookies = str.split("; ");

     var cookieObj = {}

     for (var i=0; i<cookies.length; i++)

     {

         var line = cookies[i];

         var pos = line.indexOf("=");

         var key = line.substr(0, pos);

         var val = line.substr(pos+1);

         cookieObj[key] = val;

     }

     return cookieObj;

 }

 function getCookieArray()

 {

     return getCookieArrayByStr(document.cookie);

 }

 function compareCookie(strOldCookie)

 {

     var objOld = getCookieArrayByStr(strOldCookie);

     var objNew = getCookieArray();

     var oldOnly = {};

     var newOnly = {};

     var diff = {};

     for (var key1 in objOld)

     {

         var val1 = objOld[key1];

         var val2 = objNew[key1];

         if (typeof(val2) == "undefined")

         {

             oldOnly[key1] = val1;

         }

         else

         {

             if (val1 != val2)

             {

                 diff[key1] = {oldVal: val1, newVal: val2};

             }

         }

     }

     for (var key2 in objNew)

     {

         var val1 = objOld[key2];

         var val2 = objNew[key2];

         if (typeof(val1) == "undefined")

         {

             newOnly[key2] = val2;

         }

     }

     var retObj = {};

     retObj.__OLDO = oldOnly;

     retObj.__NEWO = newOnly;

     retObj.__DIFF = diff;

     return retObj;

 }

 var strOldCookie = "cookieUserId=1386816500920952; cuid=1386816500920605"

 var ret = compareCookie(strOldCookie);