function toggleOverlay()
{
	var firstDiv=document.getElementById('mainContainerDark');
	var secondDiv=document.getElementById('secondaryContainer');
	
	if(firstDiv.style.display == "none")
	{
		firstDiv.style.display = "block";
		secondDiv.style.display = "block";
	}
	else
	{
		firstDiv.style.display = "none";
		secondDiv.style.display = "none";
	}
	return false;
}