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

 document.addEventListener('contextmenu', function(e){
alert("Sorry, right click is disabled to prevent leakage of confidential functions");
e.preventDefault();
});

document.onkeydown = function(e) {
  if(event.keyCode == 123) {
     return false;
  }
  if(e.ctrlKey && e.shiftKey && e.keyCode == 'I'.charCodeAt(0)) {
     return false;
  }
  if(e.ctrlKey && e.shiftKey && e.keyCode == 'C'.charCodeAt(0)) {
     return false;
  }
  if(e.ctrlKey && e.shiftKey && e.keyCode == 'J'.charCodeAt(0)) {
     return false;
  }
  if(e.ctrlKey && e.keyCode == 'U'.charCodeAt(0)) {
     return false;
  }
    if(e.ctrlKey && e.keyCode == 'S'.charCodeAt(0)) {
     return false;
  }

}