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;