;(function($){

/*******************************************************************************************/	

// jquery.pajinate.js - version 0.2

// A jQuery plugin for paginating through any number of DOM elements

// 

// Copyright (c) 2010, Wes Nolte (http://wesnolte.com)

// Liscensed under the MIT License (MIT-LICENSE.txt)

// http://www.opensource.org/licenses/mit-license.php

// Created: 2010-04-16 | Updated: 2010-04-26

/*******************************************************************************************/

	
$.fn.pajinate = function(options){
		
// Set some state information

		var current_page = 'current_page';

		var items_per_page = 'items_per_page';

		
		var meta;

	
		// Setup default option values

		var defaults = {

			item_container_id : '.content',

			items_per_page : 10,
			
nav_panel_id : '.page_navigation',

			num_page_links_to_display : 20,
		
	start_page : 0,

			nav_label_first : '',

			nav_label_prev : 'Forrige',

			nav_label_next : 'Neste',

			nav_label_last : ''

		};

		var options = $.extend(defaults,options);

		var $item_container;

		var $page_container;

		var $items;

		var $nav_panels;

	
		return this.each(function(){

			$page_container = $(this);

			$item_container = $(this).find(options.item_container_id);

			$items = $page_container.find(options.item_container_id).children();

			meta = $page_container;

			// Initialise meta data

			meta.data(current_page,0);
			meta.data(items_per_page, options.items_per_page);

			// Get the total number of items

			var total_items = $item_container.children().size();

			
// Calculate the number of pages needed

			var number_of_pages = Math.ceil(total_items/options.items_per_page);

			// Construct the nav bar

			var more = '<span class="ellipse more">...</span>';

			var less = '<span class="ellipse less">...</span>';

			var navigation_html="";
			if(number_of_pages >1)
			{
			navigation_html ='<a class="first_link" href="">'+ options.nav_label_first +'</a>';

			

				navigation_html += '<a class="previous_link" href="" style="display:none">'+ options.nav_label_prev +'</a>'+ less;

				var current_link = 0;

			
	while(number_of_pages > current_link){

					navigation_html += '<a class="page_link" href="" longdesc="' + current_link +'">'+ (current_link + 1) +'</a>';

					current_link++;

				}
		
				navigation_html += more+ '<a class="next_link" href="">'+ options.nav_label_next +'</a>' ;

				navigation_html += '<a class="last_link" href="">'+ options.nav_label_last +'</a>';
			}

			// And add it to the appropriate area of the DOM
	
			$nav_panels = $page_container.find(options.nav_panel_id);
	if(number_of_pages ==1)
		{$nav_panels.css('display','none');}
	else
{	
	$nav_panels.html(navigation_html).each(function(){

			
		$(this).find('.page_link:first').addClass('first');
	
				$(this).find('.page_link:last').addClass('last');

				
});
}
			
// Hide the more/less indicators

			$nav_panels.children('.ellipse').hide();

			
// Set the active page link styling

			$nav_panels.find('.previous_link').next().next().addClass('active_page');

			
			/* Setup Page Display */

			// And hide all pages

			$items.hide();

			// Show the first page
			
			$items.slice(0, meta.data(items_per_page)).show();

           
			/* Setup Nav Menu Display */

			// Page number slices

			
			var total_page_no_links = $page_container.children(options.nav_panel_id+':first').children('.page_link').size();

			options.num_page_links_to_display = Math.min(options.num_page_links_to_display,total_page_no_links);


			$nav_panels.children('.page_link').hide();
 			// Hide all the page links

			// And only show the number we should be seeing
	
			$nav_panels.each(function(){

				$(this).children('.page_link').slice(0, options.num_page_links_to_display).show();
			
			});

			
/* Bind the actions to their respective links */

			 
			// Event handler for 'First' link

			$page_container.find('.first_link').click(function(e){

				e.preventDefault();

				
movePageNumbersRight($(this),0);
				goto(0);
				
			});
			// Event handler for 'Last' link

			$page_container.find('.last_link').click(function(e){
				e.preventDefault();

				var lastPage = total_page_no_links - 1;

				movePageNumbersLeft($(this),lastPage);

				goto(lastPage);
			});
			
// Event handler for 'Prev' link

			$page_container.find('.previous_link').click(function(e){

				e.preventDefault();

				showPrevPage($(this));

			});


			
// Event handler for 'Next' link

			$page_container.find('.next_link').click(function(e){

				e.preventDefault();
				
showNextPage($(this));

			});

			
// Event handler for each 'Page' link

			$page_container.find('.page_link').click(function(e){
				e.preventDefault();

				goto($(this).attr('longdesc'));

				//$(window).scrollTop(0);
				
			});
			
// Goto the required page

			goto(parseInt(options.start_page));

			toggleMoreLess();

			
		});


		
function showPrevPage(e){

			new_page = parseInt(meta.data(current_page)) - 1;
			// Check that we aren't on a boundary link

			if($(e).siblings('.active_page').prev('.page_link').length==true){

				movePageNumbersRight(e,new_page);

				goto(new_page);

			}

		};

		function showNextPage(e){

			new_page = parseInt(meta.data(current_page)) + 1;

			
// Check that we aren't on a boundary link

			if($(e).siblings('.active_page').next('.page_link').length==true){
		
				movePageNumbersLeft(e,new_page);

						goto(new_page);

			}

		};

		function goto(page_num){

						
var ipp = meta.data(items_per_page);

						
var isLastPage = false;

			
			// Find the start of the next slice

						start_from = page_num * ipp;

			
			// Find the end of the next slice

						end_on = start_from + ipp;

						// Hide the current page
	
					$items.hide().slice(start_from, end_on)
.show();

			
			// Reassign the active class

						if(page_num >0)

						{

						$page_container.find(options.nav_panel_id).children('.previous_link').css('display','block');

						}

						if(page_num == 0)
						{$page_container.find(options.nav_panel_id).children('.previous_link').css('display','none');}
			
			$page_container.find(options.nav_panel_id).children('.page_link[longdesc=' + page_num +']').addClass('active_page').siblings('.active_page')
.removeClass('active_page');

						// Set the current page meta data
						meta.data(current_page,page_num);

			
			// Hide the more and/or less indicators

						toggleMoreLess();
						$(window).scrollTop(0);

		};
	
	

		// Methods to shift the diplayed index of page numbers to the left or right

		function movePageNumbersLeft(e, new_p){

			var new_page = new_p;

			
var $current_active_link = $(e).siblings('.active_page');

		
	if($current_active_link.siblings('.page_link[longdesc=' + new_page +']').css('display') == 'none'){

				
				$nav_panels.each(function(){

								// Hide all the page links

								$(this).children('.page_link').hide().slice(parseInt(new_page - options.num_page_links_to_display + 1) , new_page + 1)
.show();
		
						});

			}

		} 

		
function movePageNumbersRight(e, new_p){

			var new_page = new_p;

			
var $current_active_link = $(e).siblings('.active_page');

			
if($current_active_link.siblings('.page_link[longdesc=' + new_page +']').css('display') == 'none'){

				$nav_panels.each(function(){

 				// Hide all the page links
				$(this).children('.page_link').hide()
.slice( new_page , new_page + parseInt(options.num_page_links_to_display)).show();

				});

			}

		}

		
// Show or remove the ellipses that indicate that more page numbers exist in the page index than are currently shown

		function toggleMoreLess(){
			if(!$nav_panels.children('.page_link:visible').hasClass('last')){
				$nav_panels.children('.more').show();

				$nav_panels.children('.next_link').show();
				$nav_panels.children('.last_link').show();


			}else {

				$nav_panels.children('.more').hide();

				$nav_panels.children('.next_link').hide();
				$nav_panels.children('.last_link').hide();

			}

			
if(!$nav_panels.children('.page_link:visible').hasClass('first')){

				$nav_panels.children('.less').show();

				$nav_panels.children('.previous_link').show();

				$nav_panels.children('.first_link').show();
			}else {

				$nav_panels.children('.less').hide();

				$nav_panels.children('.previous_link').hide();
				$nav_panels.children('.first_link').hide();

			}
			
	
		}

		};
	
})(jQuery);