// delete event
        function deleteArray() {
            // get checked data-id
            let checked = [];
            for(let i = 0; i < check.length; i++) {
                if(check[i].checked === true) {
                    checked.push(check[i].getAttribute('data-id'));
                }
            }

            // if checked data-id is empty
            if(checked.length === 0) {
                alert('삭제할 게시물을 선택해주세요');
                return false;
            }

            // array to json
            let json = JSON.stringify(checked);

            // if checked data-id is not empty
            // make form method csrf token
            let form = document.createElement('form');
            form.setAttribute('method', 'post');
            form.setAttribute('action', '/board/notice');

            // make input type hidden
            let token = document.createElement('input');
            token.type = 'hidden';
            token.name = '_token';
            token.value = '{{ csrf_token() }}';
            form.appendChild(token);

            // make input type hidden
            let method = document.createElement('input');
            method.type = 'hidden';
            method.name = '_method';
            method.value = 'delete';
            form.appendChild(method);

            // make input type hidden
            let data = document.createElement('input');
            data.type = 'hidden';
            data.name = 'ids';
            data.value = json;
            form.appendChild(data);

            document.body.appendChild(form);
            form.submit();

        }