$(function(){
	
	$("html").easeScroll({
		  frameRate: 60,
		  animationTime: 1400,
		  stepSize: 100,
		  pulseAlgorithm: !0,
		  pulseScale: 7,
		  pulseNormalize: 1,
		  accelerationDelta: 40,
		  accelerationMax: 1,
		  keyboardSupport: !0,
		  arrowScroll: 50
	});


	let $animation_elements = $('.ani');
	let $window = $(window);

	function check_if_in_view() {
	  let window_height = $window.height();
	  let window_top_position = $window.scrollTop();
	  let window_bottom_position = (window_top_position + window_height);
	 
	  $.each($animation_elements, function() {
		let $element = $(this);
		let element_height = $element.outerHeight();
		let element_top_position = $element.offset().top;
		let element_bottom_position = (element_top_position + (element_height / 2));
	 
		//check to see if this current container is within viewport
		if ((element_bottom_position >= window_top_position) &&
			(element_top_position <= window_bottom_position)) {
		  $element.addClass('in-view');
		} else {
		  //$element.removeClass('in-view');
		}
	  });
	}

	$window.on('scroll resize', check_if_in_view);
	$window.trigger('scroll');
	
	chkNum = 0;
	$(".this_page").on("click",function(){
		if(chkNum == 0){
			$(this).addClass("act");
			$(this).next("ul").slideDown();
			chkNum = 1;
		}else{
			$(this).removeClass("act");
			$(this).next("ul").slideUp();
			chkNum = 0;
		}		
	})



	/* m18 */
	$(window).scroll(function(){
		let scroll = $(window).scrollTop();
		let TopPosi = $(".m18 .history").offset().top;
		let headH = $("#header").height() + 60;
		if(scroll > TopPosi - headH){
			$(".m18 .history .titlearea>div").addClass("act");
		}else{
			$(".m18 .history .titlearea>div").removeClass("act");
		}
	})




})