var rcmsg="All content copyright Bolidt Kunststoftoepassing B.V."
			
function buttoncheck(e) {
	if(document.all && event.button==2) {
    	alert(rcmsg)
    	return false
  	}
  	if(document.layers && e.which==3) {
    	alert(rcmsg)
    	return false
	}
}
if(document.layers) {document.captureEvents(Event.MOUSEDOWN);}
document.onmousedown = buttoncheck;