$(function(){
    var list = $(".motto");
    list.on('click', function(){
        var now = $(this);
        var nowChild = now.children("ul");
        var nowSpan = now.children("ul span");
    	nowChild.stop(true,false).slideToggle();
        if(nowChild.hasClass("active")){
            nowChild.addClass("noactive");
            nowSpan.css('background-image', 'url(https://cdn1.cookingschool.jp/image/sp/new/motto_1.png)');
            nowChild.removeClass("active");
        }else if(nowChild.hasClass("noactive")){
            nowChild.addClass("active");
            nowSpan.css('background-image', 'url(https://cdn1.cookingschool.jp/image/sp/new/motto_2.png)');
            nowChild.removeClass("noactive");
        }
    });
});