function nocontextmenu()
{
   event.cancelBubble = true
   event.returnValue = false;
   return false;
}

function norightclick(e)	
{
  if (window.Event)	
  {
     if (e.which == 2 || e.which == 3)
   	return false;
  }
  else
  if (event.button == 2 || event.button == 3)
  {
     event.cancelBubble = true
     event.returnValue = false;
     return false;
  }	
}

document.oncontextmenu = nocontextmenu;		
document.onmousedown = norightclick;