window.addEventListener("load", function() {
    new Swiper("#swiper_1", {
        speed: 600,
        navigation: {
            nextEl: '.swiper-button-next',
            prevEl: '.swiper-button-prev',
        }
    });

    scrollInit();
});


// 맨 위로 버튼
$(document).on("click", "#btnMoveTop", function () {
    $("html, body").animate({scrollTop: 0}, "fast");
});

let header = document.getElementsByTagName("header")[0];
let nav = document.getElementsByTagName("nav")[0];
let headerHeight = header.offsetHeight;
let navHeight = nav.offsetHeight;
window.onscroll = function () {
    scrollInit();
};

function scrollInit()
{
    let windowTop = window.scrollY;
    let footHeight = document.getElementsByTagName("footer")[0].offsetTop;
    if (windowTop >= (headerHeight + navHeight)) {
        header.classList.add("position-fixed");
        nav.classList.add("position-fixed");
    }else{
        header.classList.remove("position-fixed");
        nav.classList.remove("position-fixed");
    }

    if((windowTop + window.innerHeight) > footHeight) {
        $("#btnMoveTop").css("position", "absolute");
    }else{
        $("#btnMoveTop").css("position", "fixed");
    }
}