var message="CzechBeadsDirect: \n\n Please click left button on images !";
function click(e) 
{ if (document.all) { if (event.button == 2) { alert(message); return false;}}
  if (document.layers) { if (e.which == 3) { alert(message); return false;}}}
if (document.layers) { document.captureEvents(Event.MOUSEDOWN);}
document.onmousedown=click;