function right(e) {
if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2)){
alert("DTH SOFTWARE © 2010");
return false;
}
else if (navigator.appName == 'Microsoft Internet Explorer' &&
(event.button == 2 || event.button == 3)) {
alert("DTH SOFTWARE © 2010");
return false;
}
return true;
}
document.onmousedown=right;
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=right;


<!-- Begin
function disableselect(e){
return false
}
function reEnable(){
return true
}
document.onselectstart=new Function ("return false")
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
}
// End -->