var message="Sorry, you can not click right mouse!";
function clickIE4(){
if (event.button==ctrl){
alert(message);
return false;
}
}
function clickNS4(e){
if (document.layers||document.getElementById&&!document.all){
if (e.which==ctrl||e.which==ctrl){
alert(message);
return false;
}
}
}
if (document.layers){
document.captureEvents(Event.CTRLDOWN);
document.onctrldown=clickNS4;
}
else if (document.all&&!document.getElementById){
document.onctrldown=clickIE4;
}
document.oncontextmenu=new Function("alert(message);return false")