Роман Огарков

$.tablesorter.addParser({
			    id: 'dd:mm:yyyy hh:mm',
			    is: function(s) {
			        return false;
			    },
			    format: function(s) {
			        var date = s.split(/[: ]/);
			        return new Date(date[4], date[3], date[2], date[1], date[0]).getTime();
			    },
			    type: 'numeric'
			});

var calculateQuantityPrice = function($action, $this) {
		var $siblings = $this.closest('.input-row').find('input:text');
		var $basketSum = $this.closest('.basket-row').find('.sum-container span');
		var presentValue = parseInt($siblings.val());
		var priceValue = parseInt($basketSum.attr('data-sum'));
		var presentPriceValue = parseInt($basketSum.text());

	    if ($action == 'plus') {
	        $siblings.val(presentValue + 1);
	        $basketSum.text(priceValue + presentPriceValue + ' руб.');
	    } else if ($action == 'minus') {
	        $siblings.val(presentValue - 1);
	        $basketSum.text(presentPriceValue - priceValue + ' руб.');
	    }
	};

	$('.p-btn').click(function(e) {
	    e.preventDefault();

	    calculateQuantityPrice('plus', $( this ))
	});

	$('.m-btn').click(function(e) {
	    e.preventDefault();

	    calculateQuantityPrice('minus', $( this ));
	});