$(document).ready(function(){

	var elPerPage = 3;
	var elWidth = 312; 
	
	var elNumber = $('#news-list li').length;
	var pages = Math.ceil(elNumber / elPerPage);
	var currentPage = 0;
	
	//left arrow off
	$('.prev').addClass('no-display');
	
	//right arrow off
	if(elNumber <= elPerPage)
		$('.next').addClass('no-display');

	
	//right arrow
	$('.next').click(function(e) {
		e.preventDefault();
		if(currentPage < pages -1)
		{
			currentPage++;
			$('.prev').removeClass('no-display');
			$('#news-list').animate({ 'marginLeft': -(elPerPage * elWidth * currentPage) }, 700, 'swing');
			
			if(currentPage == (pages-1))
				$(this).addClass('no-display');
		}
	});
	
	//left arrow
	$('.prev').click(function(e) {
		e.preventDefault();
		if(currentPage > 0)
		{
			currentPage--;
			$('.next').removeClass('no-display');
			$('#news-list').animate({ 'marginLeft': -(elPerPage * elWidth * currentPage) }, 700, 'swing');
			if(currentPage == 0)
				$(this).addClass('no-display');
		}
	});
});