function startClock()
{
	timeLeft = timeLeft - 1;
	setTimeout("startClock()", 1000);
	if (timeLeft == 0)
	{
		switch(current)
		{
			case myOpacityEffect1:
				toggleDisplay(myOpacityEffect2);
				break;
			case myOpacityEffect2:
				toggleDisplay(myOpacityEffect3);
				break;
			case myOpacityEffect3:
				toggleDisplay(myOpacityEffect1);
				break;
		}
		timeLeft = 5;
	}
}

function toggleDisplay(effect) {effect.toggle();current.toggle();current = effect;}