if (window.Event)
	document.captureEvents(Event.MOUSEUP);

function nocontextmenu(){
	event.cancelBubble = true, event.returnValue = false;
	return false;
} 

function norightclick(e) {
	if (window.Event) {
		if (e.which == 2 || e.which == 3) return false;
	}else if (event.button == 2 || event.button == 3){
		event.cancelBubble = true, event.returnValue = false;
		return false;
	}
}

if (document.layers)
	document.captureEvents(Event.MOUSEDOWN);

document.oncontextmenu = nocontextmenu;
document.onmousedown = norightclick;
document.onmouseup = norightclick;