Convert Facebook Graph Api Feed Create Time into Second

Graph api gives json format data, here is the url we taking

https://graph.facebook.com/valid_user_id/feed?access_token=some_valid_access_token

This url of graph api return json format date like this

 "data": [
      {
         "id": "344128252278047_552656441425226",
         "from": {
            "category": "Athlete",
            "name": "Sachin Tendulkar",
            "id": "344128252278047"
         },
         "message": "Childhood click.",
         "picture": "http://photos-a.ak.fbcdn.net/hphotos-ak-ash4/487885_552656431425227_822007316_s.jpg",
         "link": "https://www.facebook.com/photo.php?fbid=552656431425227&set=a.402901949734010.98326.344128252278047&type=1&relevant_count=1",
         "icon": "http://static.ak.fbcdn.net/rsrc.php/v2/yz/r/StEh3RhPvjk.gif",
         "actions": [
            {
               "name": "Comment",
               "link": "https://www.facebook.com/344128252278047/posts/552656441425226"
            },
            {
               "name": "Like",
               "link": "https://www.facebook.com/344128252278047/posts/552656441425226"
            }
         ],
         "privacy": {
            "value": ""
         },
         "type": "photo",
         "status_type": "added_photos",
         "object_id": "552656431425227",
         "created_time": "2013-02-13T05:56:11+0000",
         "updated_time": "2013-02-13T05:56:11+0000",
         "shares": {
            "count": 2802
         },
         "likes": {
            "data": [
               {
                  "name": "Tanmay Bibave",
                  "id": "100003692878321"
               },
               {
                  "name": "Niranjan Ravikumar",
                  "id": "100000410376292"
               },
               {
                  "name": "Anik Sarma",
                  "id": "100001882359476"
               },
               {
                  "name": "Alok Joshi",
                  "id": "100001626819135"
               }
            ],
            "count": 50882
         },
         "comments": {
            "count": 1539
         }
      },

Here is the code after fetching the create time and converted into seconds

	function formatDateTime(dateStr){
		var year, month, day, hour, minute, dateUTC, date, ampm, d, time;
		var iso = (dateStr.indexOf(' ')==-1&&dateStr.substr(4,1)=='-'&&dateStr.substr(7,1)=='-'&&dateStr.substr(10,1)=='T') ? true : false;

			year = dateStr.substr(0,4);
			month = parseInt((dateStr.substr(5,1)=='0') ? dateStr.substr(6,1) : dateStr.substr(5,2))-1;
			day = dateStr.substr(8,2);
			hour = dateStr.substr(11,2);
			minute = dateStr.substr(14,2);
			dateUTC = Date.UTC(year, month, day, hour, minute);					
			date = new Date(dateUTC);
			var curDate = new Date();

			var currentStamp = curDate.getTime();					
			var datesec = date.setUTCSeconds(0);
			var difference = parseInt((currentStamp - datesec)/1000);
			return difference;								
	}

calling code

	var abc =formatDateTime(data[k].created_time);
	console.log(abc);

Here you pass in date[k].created_time = 2013-02-13T05:56:11+0000