function rf(){var touche=116;if (touche==event.keyCode){event.keyCode=0;return false;}if(event.ctrlKey){if(event.keyCode==66||event.keyCode==68||event.keyCode==78||event.keyCode==82||event.keyCode==116){event.keyCode=0;return false;}}}function ds(){if (event.button==0){event.pasdeclic=true;event.returnValue=false;return false;}}
  document.oncontextmenu=ds;
  document.onkeydown=rf;