function click(evt) {
if (navigator.appName.indexOf("Microsoft") != -1){
if (event.button==2) {
alert('Error - Copyright by multimediawerke');
return false
};
};
if (navigator.appName.indexOf("Netscape") != -1) {
if ( evt.which == 3 ) {
alert('Error - Copyright by multimediawerke');
return false
};
};
};
if (navigator.appName.indexOf("Netscape") != -1) {
document.captureEvents( Event.MOUSEDOWN )
};
document.onmousedown = click;