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; 
		} 
} 
document.oncontextmenu = nocontextmenu; // for IE5+ 
document.onmousedown = norightclick; // for all others