// JavaScript Document
browser=navigator.appName;
browserNum= parseInt(navigator.appVersion);

if ((browser=="Netscape")&&(browserNum<5))
{
	//ns 4.x
	layerRef = "document.layers['";
	endLayerRef = "']";
	styleRef="";
}
		else if ((browser == "Netscape") && (browserNum >= 5))
		{
			// Netscape 6
			layerRef = "document.getElementById('";
			styleRef = ".style";
			endLayerRef = "')";
		}

else
{
	//IE
	layerRef = "document.all['";
	endLayerRef = "']";
	styleRef=".style";
}
	function nascondiLayer(layerName){
		eval(layerRef + layerName + endLayerRef + styleRef + ".visibility='hidden'");
	}
	
	function mostraLayer(layerName){
		eval(layerRef + layerName + endLayerRef + styleRef + ".visibility='visible'");
	}