function click (e)

{
if(!e)
	e = window.event;
if((e.type && e.type == "contextmenu") || (e.button && e.button == 2) || (e.which && e.which == 3)) {
	if(window.opera)
		window.alert("Sorry: Diese Funktion ist deaktiviert.");
	return false;
	}
}
if(document.layers)
	document.captureEvents(Event.MOUSEDOWN);
document.onmousedown = click;
document.oncontextmenu = click;