function click(e) 
{
  if (navigator.appName == "Netscape" && e.which==3 ) {
  alert("如需源代码请联系本页作者！谢谢！\n Please contact author for the code! \n Thank you!") 
  return false
  }
  if (event.button==2 ) 
  {alert("如需源代码请联系本页作者！谢谢！\n Please contact author for the code! \n Thank you!") 
  }
}

  if (navigator.appName == "Netscape") { document.captureEvents(Event.MOUSEDOWN) } 
  document.onmousedown=click