function toggleLayer( whichLayer, whichAnchor, showText, hideText )
{
	if ( document.getElementById )
	{
		var thisLayer = document.getElementById( whichLayer ).style;
		var thisAnchor = document.getElementById( whichAnchor );
	}
	else if ( document.all )
	{
		var thisLayer = document.all[whichLayer].style;
		var thisAnchor = document.all[whichAnchor];
	}
	else if ( document.layers )
	{
		var thisLayer = document.layers[whichLayer].style;
		var thisAnchor = document.layers[whichAnchor];
	}

	if( thisLayer.display == "none" )
	{
		thisLayer.display = "block";
		thisAnchor.innerHTML = hideText;
	}
	else
	{
		thisLayer.display = "none";
		thisAnchor.innerHTML = showText;
	}
}