function _stopEvent(event)
{
	if (event == null)
	{
		event = window.event;
	}
	
	if (event.stopPropagation)
	{
		event.stopPropagation();
		event.preventDefault();
	}
	else
	{
		window.event.cancelBubble = true;
	}
}

function _stopEventPropagation(event)
{
	if (event == null)
	{
		event = window.event;
	}
	
	if (event.stopPropagation)
	{
		event.stopPropagation();
	}
	else
	{
		window.event.cancelBubble = true;
	}
}