/*------------------------------------------

*	Date: 31 January 2008

*	Author: Celine Chung & Colin Campbell-McPherson

*	Description: A function that assigns different

*	classes to a set of products and will show a

*	set of products per page according to the class

*	that was assign to them and hide the rest.

-------------------------------------------*/



//global variables

var $current_page;

var $total;

var $firstItem;

var $lastItem;

var $itemsPerPage = 6



$(document).ready(function() {

	init();

	

	$('a#more_products').click(function() {

		next_page();

		return false;

	});



	$('a#less_products').click(function() {

		previous_page();

		return false;

	});	

	

});







function init() {

	//gets the total image count

	$total = $('li.product-image').size();

	$current_page = 0

	

	for ( var i = 0; i <= $total; i++ ) {

		//pageNo is the count divided by the items per page

		var $pageNo = Math.floor(i/6);	

		$('li.product-image:eq(' + i + ')').addClass('page_' + $pageNo + '');

	};



	show_page($current_page);

	

};



function show_page($pageNo) {

	//hides all products

	$('li.product-image').hide();

	//only show products that have a certain class

	$('li.page_' + $pageNo + '').show();

	//finds the first item of the set of 6

	$firstItem = $pageNo * $itemsPerPage;

	//finds the last item of the set of 6

	$lastItem = $pageNo * $itemsPerPage + $itemsPerPage - 1;

};



function next_page () {

	//Check to make sure we're not going to a page past the last

	if ( $lastItem < $total ) {

		//Add one to the current page count

		$current_page++;

		show_page($current_page);

	};

};



function previous_page () {

	//Check to make sure we're not going to page -1

	if ( $firstItem > 0 ) {

		//Remove one from the current page count

		$current_page--;

		show_page($current_page);

	};

};