//Presentations
		function presentations()
		{
			$.ajax({
			  url: '/jsonapi/presentations/',
			  type: 'POST',
			  dataType: 'json',
			  complete: function(xhr, textStatus) {
			    setTimeout("presentations()", 5000);
			  },
			  success: function(data, textStatus, xhr) {

				$(".presentation").html(data.length);

				console.log('Checking presentations');
				var item_list = '';
				for (var i=0; i < data.length; i++) {

					var thumbnail = '<div class="thumbnail"><img src="/static/img/default_avatar.png" /></div>';
					var title = '<span class="title">' + data[i].name + '</span>';
					var author = '<span class="author">' + data[i].user + '</span>';
					var twitter_name = '<span class="twitter_username">@' + data[i].twitter_name + '</span>';
					var content = '<div class="content">'+ title + author + twitter_name + '</div>';

					var countdown = (data[i].status == 'ongoing' ? '<div class="countdown">9:38</div>' : '');

					var item = '<li class="'+ data[i].status +'">'+ thumbnail + content + countdown + '</li>';

					item_list += item;

					var now = new Date();
					var endingSoon = new Date(now);
					endingSoon.setMinutes(now.getMinutes() + 1);
					// $(".ongoing .countdown").countdown(endingSoon,
					// 	{
					// 		precision: "simple"
					// 	}
					// );

				};

				console.log(item_list);
				console.log($("#presentations ul").html());
				if($("#presentations ul").html() == item_list)
				{
					console.log('No change in presentation');
				}
				else
				{
					console.log('Presentations changed');
					$("#presentations ul").html(item_list);
				}


			  },
			  error: function(xhr, textStatus, errorThrown) {
			    //called when there is an error
			  }
			});
		}

		presentations();