<script>
  // Mencegah Klik Kanan
  document.addEventListener('contextmenu', event => event.preventDefault());

  // Mencegah Tombol F12, Ctrl+Shift+I, Ctrl+Shift+J, Ctrl+U
  document.onkeydown = function(e) {
    if (e.keyCode == 123 || 
       (e.ctrlKey && e.shiftKey && (e.keyCode == 'I'.charCodeAt(0) || e.keyCode == 'J'.charCodeAt(0))) || 
       (e.ctrlKey && e.keyCode == 'U'.charCodeAt(0))) {
      return false;
    }
  };
</script>