var yes = false;
var name;

function hideLayer (LayerName)
	{
		if (document.getElementById != null)
			document.getElementById(LayerName).style.visibility = 'hidden';
		else if (document.all != null)
			document.all[LayerName].style.visibility = 'hidden';
		else if (document.layers != null)
			document.layers[LayerName].visibility = 'hide';

		yes = false;
	}

function showLayer (LayerName)
	{
		if (yes)
			hideLayer (name);

		if (document.getElementById != null)
			document.getElementById(LayerName).style.visibility = 'visible';
		else if (document.all != null)
			document.all[LayerName].style.visibility = 'visible';
		else if (document.layers != null)
			document.layers[LayerName].visibility = 'show';

		yes = true;
		name = LayerName;
	}

/*
function showLayer (LayerName)
	{
		if (document.layers != null)
			document.layers[LayerName].visibility = 'show';
		else
			document.all[LayerName].style.visibility = 'visible';
	}

function hideLayer (LayerName)
	{
		if (document.layers != null)
			document.layers[LayerName].visibility = 'hide';
		else
			document.all[LayerName].style.visibility = 'hidden';
	}
*/