message = "We have unabled right click on our pages. If you are one of our valued customers and would like a copy of a photo placed on our site, please contact us to get your copy.";

function NoRightClick(b) {
   if(((navigator.appName=="Microsoft Internet Explorer")&&(event.button > 1))
   ||((navigator.appName=="Netscape")&&(b.which > 1))){
   alert(message);
   return false;
   }
}
document.onmousedown = NoRightClick;