if(document.layers){
 window.captureEvents(Event.MOUSEDOWN|Event.MOUSEUP);
 window.onmousedown=mausNS;
 window.onmouseup=mausNS;
function mausNS(e){
 if(e.which==2|e.which==3){alert("ROCKABILLY ERROR");return false;}
 else{return true;}}}
 
if(document.all){
 document.onmousedown=mausie;
function mausie(){
 if(event.button==2|event.button==3){alert("ROCKABILLY ERROR");}}}