 <button id="fullscreen-btn">Go Fullscreen</button>

    <script>
        const toggleButton = document.getElementById('toggleButton');
        const content = document.getElementById('content');
        const gridContainer = document.getElementById('gridContainer');
        const fullscreenButton = document.getElementById('fullscreen-btn');

        toggleButton.addEventListener('click', () => {
            
            if (content.classList.contains("visible")) {
                content.classList.remove("visible");
                gridContainer.classList.remove("visible");
                fullscreenButton.style.display = 'none';
                toggleButton.textContent = "Show ?"; 
            } else {
                content.classList.add("visible");
                gridContainer.classList.add("visible");
                fullscreenButton.style.display = 'block'; 
                toggleButton.textContent = "Hide Content ?"; 
            }
        });

        // Fullscreen functionality
        fullscreenButton.onclick = function() {
            const btn = this;

            if (!document.fullscreenElement) {
               
                document.documentElement.requestFullscreen();
                btn.textContent = 'Exit Fullscreen';
                document.body.style.overflow = 'auto'; 
            } else {
              
                if (document.exitFullscreen) {
                    document.exitFullscreen();
                    btn.textContent = 'Go Fullscreen';
                    document.body.style.overflow = 'hidden'; 
                }
            }
        };

        function openPage(pageUrl) {
            const win = window.open(pageUrl, '_blank');
            win.focus();
        }

     
        document.addEventListener('contextmenu', function(event) {
            event.preventDefault();
        });

        
        content.classList.remove("visible"); 
        gridContainer.classList.remove("visible"); 
        toggleButton.textContent = "Go get A+"; // Set the initial button text
    </script>

</body></html>