https://www.tokyu-resort.co.jp/common/js/index.js

1var slideWidth = 0;
2var timerID;
3
4$(window).on("load",function(){
5//$(window).load(function () {
6	sliderInit();
7});
8$(window).on("resize",function(){
9//$(window).resize(function() {
10	slideRresize();
11});
12
13function sliderInit(){
14	$("#news .slider .prev").click(function(e){
15		e.preventDefault();
16		doSlide("right");
17    });
18	$("#news .slider .next").click(function(e){
19		e.preventDefault();
20		doSlide("left");
21    });
22	if($("#news .slider-wrap li").length <= 3){
23		var num = $("#news .slider-wrap li").length;
24		for(i=0; i < num; i++){
25			 $("#news .slider-wrap ul").append($("#news .slider-wrap li").eq(i).clone())
26		}
27	}
28	
29	slideRresize();
30	setTimer();
31}
32
33var slideWidth;
34function slideRresize(){
35	var mr = 15;
36	var frameWidth = $(".slider-wrap").width() - (mr * 2);
37	var itemWidth = Math.floor(frameWidth * 0.334);
38	slideWidth = itemWidth + mr;
39	var ttlW = (itemWidth + mr) * $("#news .slider-wrap li").length;
40	$("#news .slider-wrap li").width(itemWidth);
41	$("#news .slider-wrap li").css("margin-right",mr);
42	$("#news .slider-wrap ul").width(ttlW);
43	
44	var itemH = $("#news .slider-wrap li").height();
45	
46	$(".slider .next img,.slider .prev img").css({"height":itemH,"width":"auto"});
47}
48
49function doSlide(direction){
50	clearInterval(timerID);
51	var move = slideWidth;
52	if(direction == "left"){
53		move = -move;
54	}else{
55		$("#news .slider-wrap ul").prepend($("#news .slider-wrap li:last"));
56		$("#news .slider-wrap ul").css("margin-left",-move);
57		move = 0;
58	}
59	$("#news .slider-wrap ul").animate({
60		'marginLeft': move
61	},function(){
62		if(direction == "left"){
63			$("#news .slider-wrap ul").append($("#news .slider-wrap li:first"));
64			$("#news .slider-wrap ul").css("margin-left",0);
65		}
66	});
67	setTimer();
68}
69function setTimer(){
70	timerID = setInterval(function() {
71		doSlide("left");
72	},5000);
73}