<script language="javascript"> 
var isNS = (navigator.appName == "Netscape") ? 1 : 0;
var EnableRightClick = 0;
if(isNS) 
document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP);
function mischandler(){
if(EnableRightClick==1){ return true; }
else {return false; }
}
function mousehandler(e){
if(EnableRightClick==1){ return true; }
var myevent = (isNS) ? e : event;
var eventbutton = (isNS) ? myevent.which : myevent.button;
if((eventbutton==2)||(eventbutton==3)) return false;
}
function keyhandler(e) {
var myevent = (isNS) ? e : window.event;
if (myevent.keyCode==96)
EnableRightClick = 1;
return;
}
document.oncontextmenu = mischandler;
document.onkeypress = keyhandler;
document.onmousedown = mousehandler;
document.onmouseup = mousehandler;
</script>