function SetVisibility( element, visible )
{
	var elm = (typeof( element ) == 'string')? document.getElementById( element ) : element;
	
	if( elm != null )
		elm.style.visibility = (visible)? 'visible' : 'hidden';
}

function StopEvent( e )
{
	if( !e )
		e = window.event;
		
	if( e.stopPropagation )
		e.stopPropagation()
	else
		e.cancelBubble = true;
}

function CancelEvent( e )
{
	if( !e )
		e = window.event;
		
	if( e.preventDefault )
		e.preventDefault();
	else
		e.returnValue = false;
		
	return false;
}