banner图片全屏显示

<script>
    $(function () {
        function reinitSize() {
            var window_h = $(window).height();
            var window_w = $(window).width();
            var main_h = window_h - 80;
            if (window_w > 960) {
                $("#myCarousel img").css({
                     "auto",
                    height: main_h + "px",
                    margin:"0 auto"
                });
            }
        }

        reinitSize();
        $(window).resize(function () {
            reinitSize();
        });
    })
</script>

#myCarousel img{
     100%;
    height: 100%;
    object-fit: cover;
}