function bderecho(e) {
if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) {
alert(" El boton derecho del raton no funciona ");
return false;
}
else {
	if (window.Event)
	{
	if (e.which == 2 || e.which == 3)
	return false;
	}
	else
	if (event.button == 2 || event.button == 3)
	{
	window.event.cancelBubble = true
	window.event.returnValue = false;
	return false;
	}
}
return true;
}
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
window.onmousedown=bderecho;
document.oncontextmenu=bderecho;
document.onmousedown=bderecho;

oncontextmenu = function(){return false};