function showHide(firstLayer, secondLayer, firstButton, secondButton) {
	var L1 = document.getElementById(firstLayer);
	var L2 = document.getElementById(secondLayer);
	var L3 = document.getElementById(firstButton);
	var L4 = document.getElementById(secondButton);
	
	if (L1.style.display == 'none')
	{
		L1.style.display = 'block';
		L2.style.display = 'none';

	}

	if (L3.className == 'off')
	{
		L3.className = 'on';
		L4.className = 'off';

	}
}