function hideLayer(name){
	if(navigator.appVersion.substring(0,1) >= "5")
		{document.getElementById(name).style.visibility="hidden";}
	else if(navigator.appName=="Netscape")
		{eval("document." +name).visibility="hidden";}
	else if(navigator.appName=="Microsoft Internet Explorer")
		{eval("document.all." +name).style.visibility="hidden";};
	};

function showLayer(name){
	if(navigator.appVersion.substring(0,1) >= "5")
		{document.getElementById(name).style.visibility="visible";}
	else if(navigator.appName=="Netscape")
		{eval("document." +name).visibility="visible";}
	else if(navigator.appName=="Microsoft Internet Explorer")
		{eval("document.all." +name).style.visibility="visible";};
	};