// JavaScript Document
function rightclick(e){
         if(document.all){
            if(event.button==2 || event.button==3){
               alert('Right click has been disabled.');
               return false;
            }
         }
         if(document.layers){
            if(e.which == 3){
               alert('Right click has been disabled.');
               return false;
            }
         }
}
if(document.layers){
   document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=rightclick;