var numPages = 5;
var currentPage = 0;
var interval = null;
var intervalTime = 10000;

// start slider
$(function() {
	interval = setInterval("nextPage()", intervalTime);
});

function nextPage() {
	gotoPage((currentPage + 1) % numPages, false);
}

function gotoPage(index, resetInterval) {
	if (index >= numPages) {
		return false;
	}
	
	if(resetInterval) {
		clearInterval(interval);
		interval = setInterval("nextPage()", intervalTime);
	}
	
	currentPage = index;
	var offset = index * -855;
	$('#slidernav a').removeClass('active');
	$('#slidernav a').eq(index).addClass('active');
	$('#slideContainer').animate({marginLeft: offset}, 800);
	return false;
}