function toggleLayer(whichLayer, action)
{
	if (document.getElementById) {
		// this is the way the standards work
		var style2 = document.getElementById(whichLayer).style;
		if (action == "hide")
			style2.display = "none";
		else
			style2.display = "block";	
	}
	else if (document.all) {
		// this is the way old msie versions work
		var style2 = document.all[whichLayer].style;
		if (action == "hide")
			style2.display = "none";
		else
			style2.display = "block";	
	}
	else if (document.layers) {
		// this is the way nn4 works
		var style2 = document.layers[whichLayer].style;
		if (action == "hide")
			style2.display = "none";
		else
			style2.display = "block";	
	}
}