//roll over menu starts here
function getNav(){

      if (navigator.appName == "Netscape") {
	  		layerStyleRef="layer.";
 			layerRef="document.layers";
 			styleSwitch="";
		}
}
function showMenu(layerName){
		

		if(document.layers){
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
		}else{
			eval('document.getElementById('+ "'" + layerName + "'" +').style.visibility = "visible"');
		}
}
function hideMenu(layerName){
		 if(document.layers){
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
		}else{
			eval('document.getElementById('+ "'" + layerName + "'" +').style.visibility = "hidden"');
		}
 		
 }