if (navigator.appName == "Netscape") {
        layerRef="document.getElementById";
        styleSwitch=".style";
    } else {
        layerRef="document.all";
        styleSwitch=".style";
    }

function showLayer(layerName) {

	//eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');

	if (navigator.appName == "Netscape") {
        	eval(layerRef+'("'+layerName+'")'+styleSwitch+'.visibility="visible"');
    	} else {
        	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
    	}

}

function hideLayer(layerName) {

        //eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');

	if (navigator.appName == "Netscape") {
        	eval(layerRef+'("'+layerName+'")'+styleSwitch+'.visibility="hidden"');
    	} else {
        	eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
    	}


}