var NN4=(document.layers);
var IE4=(document.all);
function showmsg(msg){
self.status=msg;
}
function chkBtnDown(e) {
var rr = false;
if(IE4){
if(event.button == 2 | event.button == 3) rr = true
}else{
    if(e.which == 3) rr = true
}
  if(rr){
    alert("¯f¬r¦¬¶°ºô");
    return false;
  }
}
function chkSel(){
  event.returnValue=false;
}
if(NN4){
document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown = chkBtnDown;