在node.js中检查两个日期格式的时间戳

I have one date as "Wed,21 Aug 2013 12:13:50 GMT" and another as ISODate("2013-09-02T08:20.192Z").Now I have to check which time stamp is greater in node.js. How this can be possible?I have one date as "Wed,21 Aug 2013 12:13:50 GM