// WHEN THE PAGE LOADS
$(function(){

	// HIDE THE UPDATE AND EMPTY BUTTONS
	$('.jcart-hide').remove();

	// WHEN AN ADD-TO-CART FORM IS SUBMITTED
	$('form.jcart').submit(function(){

		// GET INPUT VALUES FOR USE IN AJAX POST
		var itemId = $(this).find('input[name=item_id]').val();
		var itemPrice = $(this).find('input[name=item_qty]').val();
		var itemName = $(this).find('input[name=item_name]').val();
		var itemQty = $(this).find('input[name=item_type]').val();
		var itemAdd = $(this).find('input[name=cart_button]').val();

		// SEND ITEM INFO VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.post('/jcart/jcart-relay.php', { item_id: itemId, item_qty: itemPrice, item_name: itemName, item_type: itemQty, cart_button : itemAdd }, function(data) {

			// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
			$('#jcart').html(data);
			$('.jcart-hide').remove();
            chg('c'+itemId);

			});

		// PREVENT DEFAULT FORM ACTION
		return false;

		})


	// WHEN THE VISITOR HITS THEIR ENTER KEY
	// THE UPDATE AND EMPTY BUTTONS ARE ALREADY HIDDEN
	// BUT THE VISITOR MAY UPDATE AN ITEM QTY, THEN HIT THEIR ENTER KEY BEFORE FOCUSING ON ANOTHER ELEMENT
	// THIS MEANS WE'D HAVE TO UPDATE THE ENTIRE CART RATHER THAN JUST THE ITEM WHOSE QTY HAS CHANGED
	// PREVENT ENTER KEY FROM SUBMITTING FORM SO USER MUST CLICK CHECKOUT OR FOCUS ON ANOTHER ELEMENT WHICH TRIGGERS CHANGE FUNCTION BELOW
	$('#jcart').keydown(function(e) {

		// IF ENTER KEY
		if(e.which == 13) {

		// PREVENT DEFAULT ACTION
		return false;
		}
	});


	// JQUERY live METHOD MAKES FUNCTIONS BELOW AVAILABLE TO ELEMENTS ADDED DYNAMICALLY VIA AJAX

	// WHEN A REMOVE LINK IS CLICKED
	$('#jcart a').live('click', function(){

		// GET THE QUERY STRING OF THE LINK THAT WAS CLICKED
		var queryString = $(this).attr('href');
		queryString = queryString.split('=');

		// THE ID OF THE ITEM TO REMOVE
		var removeId = queryString[1];
        
         chg('c'+removeId);

		// SEND ITEM ID VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.get('/jcart/jcart-relay.php', { jcart_remove: removeId },
			function(data) {

			// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
			$('#jcart').html(data);
			$('.jcart-hide').remove();

			});

		// PREVENT DEFAULT LINK ACTION
		return false;

		})


	// WHEN AN ITEM QTY CHANGES
	$('#jcart input').live('change', function(){

		// GET ITEM ID FROM THE ITEM QTY INPUT ID VALUE, FORMATTED AS jcart-item-id-n
		var updateId = $(this).attr('id');
		updateId = updateId.split('-');

		// THE ID OF THE ITEM TO UPDATE
		updateId = updateId[3];

		// GET THE NEW QTY
		var updateQty = $(this).val();

		// SEND ITEM INFO VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.post('/jcart/jcart-relay.php', { item_id: updateId, item_qty: updateQty, jcart_update_item: 'update' }, function(data) {
			// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
			$('#jcart').html(data);
			$('.jcart-hide').remove();

			});

		})

	})

function chg(id){
var el;
if (el = document.getElementById(id)){
if (el.src.indexOf("/images/cart.png")>0){
el.src="/images/cart2.png"
el.title="Удалить из корзины"
}else{
el.src="/images/cart.png"
el.title="Добавить в корзину"
}
}
}

function checkAll(oForm, cbName, checked)
{
for (var i=0; i < oForm[cbName].length; i++) oForm[cbName][i].checked = checked;
}