/* ===========================================================================
 *
 * JQuery Quick Pagination
 * Version 1.0.1
 * Quick and dirty pagination for pretty much any set of elements on the page.
 *
 * Author: Mark Perkins
 * Author email: mark@allmarkedup.com
 * For full documentation and more go to http://projects.allmarkedup.com/jquery_quick_paginate/
 *
 * ---------------------------------------------------------------------------
*/

jQuery.fn.quickpaginate = function( settings ) {

	settings = jQuery.extend({
		perpage: 6,		
		pager : null,		
		showcounter : true,		
		prev : "qp_prev",
		next : "qp_next",		
		pagenumber : "qp_pagenumber",		
		totalnumber : "qp_totalnumber",		
		counter : "qp_counter"
	}, settings);

	var cm;	
	var total;	
	var last = false;	
	var first = true;	
	var items = jQuery(this);	
	var nextbut;	
	var prevbut;	
	var init = function()
	{
		items.show();		
		total = items.size();				
		if ( items.size() > settings.perpage )
		{
			items.filter(":gt("+(settings.perpage-1)+")").hide();			
			cm = settings.perpage;			
			setNav();
		}
	};
	
	var goNext = function()
	{
		if ( !last )
		{
			var nm = cm + settings.perpage;
			items.hide();			
			items.slice( cm, nm ).show();
			cm = nm;			
			if ( cm >= total  )
			{
				last = true;
				nextbut.addClass("qp_disabled");
			}			
			if ( settings.showcounter ) settings.pager.find("."+settings.pagenumber).text(cm/settings.perpage);			
			prevbut.removeClass("qp_disabled");
			first = false;
		}
	};
	
	var goPrev = function()
	{
		if ( !first )
		{
			var nm = cm-settings.perpage;
			items.hide();			
			items.slice( (nm - settings.perpage), nm ).show();
			cm = nm;			
			if ( cm == settings.perpage  )
			{
				first = true;
				prevbut.addClass("qp_disabled");
			}			
			if ( settings.showcounter ) settings.pager.find("."+settings.pagenumber).text(cm/settings.perpage);			
			nextbut.removeClass("qp_disabled");
			last = false;
		}
	};
	
	var setNav = function()
	{
		if ( settings.pager === null )
		{	
			settings.pager = jQuery('<div class="qc_pager"></div>');
			items.eq( items.size() -1 ).after(settings.pager);
		}		
		var pagerNav = $('<a class="'+settings.prev+'" href="#"><img src="/gallery/images/previous.gif" alt="Previous"  /></a><a class="'+settings.next+'" href="#"><img src="/gallery/images/next.gif" alt="Next"  /></a>');
		
		jQuery(settings.pager).append( pagerNav );		
		if ( settings.showcounter )
		{
			var counter = '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="'+settings.counter+'"><span class="'+settings.pagenumber+'"></span> / <span class="'+settings.totalnumber+'"></span></span>';			
			settings.pager.find("."+settings.prev).after( counter );			
			settings.pager.find("."+settings.pagenumber).text( 1 );
			settings.pager.find("."+settings.totalnumber).text( Math.ceil(total / settings.perpage) );
		}

		nextbut = settings.pager.find("."+settings.next);			
		prevbut = settings.pager.find("."+settings.prev);		
		prevbut.addClass("qp_disabled");
		
		nextbut.click(function(){
			goNext();
			return false;
		});
		
		prevbut.click(function(){
			goPrev();
			return false;
		});
		
	};
	
	init(); // run the function
};