// JavaScript Document
var s_w = 520;
var s_h = 247;
var slide_num = 0;
var cur_s = 0;
var ttl_w = 0;
var limit_x = 0;
$(function() {
	slide_num = $('#sub-content .slides li').size();
	if(slide_num <= 1) {
		return;
	}
	//counter reset, set limit x, adjust width of slide wrapper
	cur_s = 0;
	ttl_w = (s_w*slide_num);
	limit_x = (((s_w*slide_num) - s_w) * -1);
	$('#sub-content .slides').css('width', (s_w*slide_num));
	// init nav divs
	$('#sub-content .img-viewer').append('<div class="nav-prev"></>');
	$('#sub-content .img-viewer .nav-prev').hide();
	$('#sub-content .img-viewer').append('<div class="nav-next"></>');
	
	$('#sub-content .img-viewer .nav-prev').click(function() {
		slideImages(false);
	});
	
	$('#sub-content .img-viewer .nav-next').click(function() {
		slideImages(true);
	});
});

function slideImages( dir ) {
	cur_s = dir ? cur_s+1 : cur_s-1;
	t_x = -(s_w * cur_s);
	
	if(cur_s <= 0) {
		$('#sub-content .img-viewer .nav-prev').hide();
		$('#sub-content .img-viewer .nav-next').show();
	} else if (cur_s >= (slide_num-1)) {
		$('#sub-content .img-viewer .nav-prev').show();
		$('#sub-content .img-viewer .nav-next').hide();
	} else {
		$('#sub-content .img-viewer .nav-prev').show();
		$('#sub-content .img-viewer .nav-next').show();
	}
	$('#sub-content .slides').animate({ left: t_x }, 650);
	
	
}