function toggleLayer(whichLayer) 
{
	var toggleElement = document.getElementById("" + whichLayer + "");
	
	if (toggleElement.style.display == "block") 
	{
		toggleElement.style.display="none";
	}
	else 
	{
		toggleElement.style.display="block";
	}
}

function toggleBlock(whichLayer) 
{
	var blockElement = document.getElementById("" + whichLayer + "");
	
	if (blockElement.style.display == "block") 
	{
		blockElement.style.display="none";
	}
	else 
	{
		blockElement.style.display="block";
	}
}