var message="All rights reserved. Please contact us for details if you want to use our pictures.";
 function click(e) {if (document.all) {if
(event.button==2||event.button==3)
 {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;