function disableRightClick(){
	alert('Right clicking has been disabled.');
}

function clickIE4(){
	if (event.button == 2){
		disableRightClick();
		return false;
	}
}

function clickNS4(e){
	if (document.layers || document.getElementById && !document.all){
		if (e.which == 2 || e.which == 3){
			disableRightClick();
			return false;
		}
	}
}

if (document.layers){
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=clickNS4;
} else if (document.all && !document.getElementById){
	document.onmousedown=clickIE4;
}

document.oncontextmenu=function(){
	disableRightClick();
	return false;
}