function disableRightClick(e)
{
  var message = "Right click disabled";

  if(!document.rightClickDisabled) // initialize
  {
    if(document.layers) 
    {
      document.captureEvents(Event.MOUSEDOWN);
      document.onmousedown = disableRightClick;
    }
    else document.oncontextmenu = disableRightClick;
    return document.rightClickDisabled = true;
  }
  if(document.layers || (document.getElementById && !document.all))
  {
    if (e.which==2||e.which==3)
    {
      alert(message);
      return false;
    }
  }
  else
  {
    alert(message);
    return false;
  }
}

disableRightClick();


function handleArrowKeys(evt) {
    evt = (evt) ? evt : ((window.event) ? event : null);
    if (evt) {
        switch (evt.keyCode) {
            case 37:
				SLIDES.previous();
                break;    
            case 38:
				break;    
            case 39:
				SLIDES.next();
                break;    
            case 40:
                break;    
         }
    }
}

document.onkeyup = handleArrowKeys;