var ver = parseInt(navigator.appVersion);
var layerName;



function showLayer(layerName)
{
	if (document.getElementById)	
		{ document.getElementById(layerName).style.visibility = "visible"; }
	else if (document.all && ver == 4)
		{ document.all[layerName].style.visibility = "visible"; }
	else if (document.layers && ver == 4)
		{document.layers[layerName].visibility = "show"; }
}


function hideLayer(layerName)
{
	if (document.getElementById)	
		{ document.getElementById(layerName).style.visibility = "hidden"; }
	else if (document.all && ver == 4)
		{ document.all[layerName].style.visibility = "hidden"; }
	else if (document.layers && ver == 4)
		{document.layers[layerName].visibility = "hide"; }
}