Fullscreen()"]');
            if (document.fullscreenElement) {
                fullscreenBtn.innerHTML = '<i class="fas fa-compress"></i>';
                fullscreenBtn.title = '退出全屏';
            } else {
                fullscreenBtn.innerHTML = '<i class="fas fa-expand"></i>';
                fullscreenBtn.title = '全屏';
            }
        });

        // 防止右键菜单
        document.addEventListener('contextmenu', function(e) {
            e.preventDefault();
        });

        