var sliderImages = {
		next : {
			active : 'img/next.png',
			disabled : 'img/nextOff.png'
		},
		previous : {
			active : 'img/prev.png',
			disabled : 'img/prevOff.png'
		}
	}
$(document).ready(function() {

	//Speed of the slideshow
	var speed = 18000;
	//You have to specify width and height in #slider CSS properties
	//After that, the following script will set the width and height accordingly
	$('#mask-gallery, #gallery li').width($('#slider').width());	
	$('#gallery').width($('#slider').width() * $('#gallery li').length);
	$('#mask-gallery, #gallery li, #mask-excerpt, #excerpt li').height($('#slider').height());

	if ($('#gallery').children().length > 1){
		//Assign a timer, so it will run periodically
		var run = setInterval('newsscoller(0)', speed);	
	
		$('#gallery li:first, #excerpt li:first').addClass('selected');

		//Pause the slidershow with clearInterval
		$('#btn-pause').click(function () {
			clearInterval(run);
			return false;
		});

		//Continue the slideshow with setInterval
		$('#btn-play').click(function () {
			run = setInterval('newsscoller(0)', speed);	
			return false;
		});
	
		//Next Slide by calling the function
		$('#btn-next').click(function () {
			newsscoller(0);	
			return false;
		});
	
		//Mouse over, pause it, on mouse out, resume the slider show
		$('#slider').hover(
	
			function() {
				clearInterval(run);
			}, 
			function() {
				run = setInterval('newsscoller(0)', speed);	
			}
		); 	
	}
	else{
		$('#btn-next img').attr('src', sliderImages.next.disabled);
	}
	$('#btn-prev img').attr('src', sliderImages.previous.disabled);
	
});
function newsscoller(prev) {

	//Get the current selected item (with selected class), if none was found, get the first item
	var current_image = $('#gallery li.selected').length ? $('#gallery li.selected') : $('#gallery li:first');
	var current_excerpt = $('#excerpt li.selected').length ? $('#excerpt li.selected') : $('#excerpt li:first');

	//if prev is set to 1 (previous item)
	if (prev) {
		
		//Get previous sibling
		var next_image = (current_image.prev().length) ? current_image.prev() : $('#gallery li:last');
		var next_excerpt = (current_excerpt.prev().length) ? current_excerpt.prev() : $('#excerpt li:last');
	
	//if prev is set to 0 (next item)
	} else {
		
		//Get next sibling
		var next_image = (current_image.next().length) ? current_image.next() : $('#gallery li:first');
		var next_excerpt = (current_excerpt.next().length) ? current_excerpt.next() : $('#excerpt li:first');
	}

	//clear the selected class
	$('#excerpt li, #gallery li').removeClass('selected');
	
	//reassign the selected class to current items
	next_image.addClass('selected');
	next_excerpt.addClass('selected');
	
	//Scroll the items
	$('#mask-gallery').scrollTo(next_image, 800);		
	$('#mask-excerpt').scrollTo(next_excerpt, 800);	

	$('#btn-prev').unbind('click');
	if (!(next_image.prev().length)){
		$('#btn-prev img').attr('src', sliderImages.previous.disabled);		
	}else{
		$('#btn-prev img').attr('src', sliderImages.previous.active);
		$('#btn-prev').click(function(){
			newsscoller(1);
			return false;
		});
	}
	$('#btn-next').unbind('click');
	if (!(next_image.next().length)){
		$('#btn-next img').attr('src', sliderImages.next.disabled);
	}else{
		$('#btn-next img').attr('src', sliderImages.next.active);
		$('#btn-next').click(function(){
			newsscoller(0);
			return false;
		});
	}			
	
}