$(function() {
	$("#main_visual li").click(function() {
		$(this).addClass("current").find("img:first").hide().end().find("img:last").show();
		$(this).siblings().removeClass("current").find("img:last").hide().end().find("img:first").show();
		var index = $("#main_visual li").index($("#main_visual li.current"));
		$("#main_visual .mainimg>div").eq(index).fadeIn(effectTime).siblings().fadeOut(effectTime);
		reset();
	});

	var timer = null;
	var effectTime = 1000;
	var waitTime = 4000;

	var start = function() {
		if (!timer) {
			timer = setInterval(function() {
				var next = $("#main_visual li").index($("#main_visual li.current")) + 1;
				if (next >= $("#main_visual li").length) {
					next = 0;
				}
				$("#main_visual .mainimg>div").eq(next).fadeIn(effectTime).siblings().fadeOut(effectTime);
				$("#main_visual li").eq(next).click();
			}, waitTime);
		}
	}
	var reset = function() {
		if (timer) {
			clearInterval(timer);
			timer = null;
			start();
		}
	}
	start();
});