var stayFolded=false;
//var exImg=new Image(); exImg.src='aperta.gif'
//var unImg=new Image(); unImg.src='chiusa.gif'

var n = (document.layers) ? 1:0;
var ie = (document.all) ? 1:0;
var browser=((n || ie) && parseInt(navigator.appVersion)>=4)


var lastHelp=0;

function showLayerNumber(number){
	if (n==1) {
 		layerRef="document.layers";
		styleSwitch="";
	}else{
		layerRef="document.all";
		styleSwitch=".style";
	}
	if(lastHelp!=0){eval(layerRef+'["'+eval('"HELPMENU' + lastHelp+'"')+'"]'+styleSwitch+'.visibility="hidden"');}
	eval(layerRef+'["'+eval('"HELPMENU' + number+'"')+'"]'+styleSwitch+'.visibility="visible"');
	lastHelp=number;
}

function hideLayerNumber(number){
	if (n==1) {
		layerRef="document.layers";
		styleSwitch="";
	}else{
		layerRef="document.all";
		styleSwitch=".style";
	}

	for(nk=1;nk<19;nk++){
		eval(layerRef+'["'+eval('"HELPMENU' + nk+'"')+'"]'+styleSwitch+'.visibility="hidden"');
	}
	
}