$slideshow = {
	context: false,
	tabs: false,
	timeout: 8000,      // time before next slide appears (in ms)
	slideSpeed: 1000,   // time it takes to slide in each slide (in ms)
	tabSpeed: 300,      // time it takes to slide in each slide (in ms) when clicking through tabs
	fx: 'scrollLeft',   // the slide effect to use

	init: function() {
		// set the context to help speed up selectors/improve performance
		this.context = $('#slideshow');

		// set tabs to current hard coded navigation items
		this.tabs = $('ul.slides-nav li', this.context);

		// remove hard coded navigation items from DOM 
		// because they aren't hooked up to jQuery cycle
		this.tabs.remove();

		// prepare slideshow and jQuery cycle tabs
		this.prepareSlideshow();
	},

	prepareSlideshow: function() {
		$('.slides').css('display', 'block');

		// initialise the jquery cycle plugin -
		// for information on the options set below go to: 
		// http://malsup.com/jquery/cycle/options.html
		$('div.slides > ul', $slideshow.context).cycle({
			fx: $slideshow.fx,
			timeout: $slideshow.timeout,
			speed: $slideshow.slideSpeed,
			fastOnEvent: $slideshow.tabSpeed,
			pager: $('ul.slides-nav', $slideshow.context),
			pagerAnchorBuilder: $slideshow.prepareTabs,
			before: $slideshow.activateTab,
			pauseOnPagerHover: true,
			pause: true
		});
	},

	prepareTabs: function(i, slide) {
		// return markup from hardcoded tabs for use as jQuery cycle tabs
		// (attaches necessary jQuery cycle events to tabs)
		return $slideshow.tabs.eq(i);
	},

	activateTab: function(currentSlide, nextSlide) {
		// get the active tab
		var activeTab = $('a[href="#' + nextSlide.id + '"]', $slideshow.context);

		// if there is an active tab
		if (activeTab.length) {
			// remove active styling from all other tabs
			$slideshow.tabs.removeClass('on');

			// add active styling to active button
			activeTab.parent('li').addClass('on');
		}
	}
};


$(function() {
    // add a 'js' class to the body
    $('body').addClass('js');
    
    // initialise the slideshow when the DOM is ready
    $slideshow.init();
});