//javascript per il menu espandibile con massimo un livello aperto
var prev="null";
var trovato = true;

function inizia(){
if(document.getElementsByTagName && document.getElementById){
    document.getElementById("nav").className="jsenable";
    BuildList();
    }
}


function BuildList(){
var hs=document.getElementById("nav").getElementsByTagName("h3");
for(var i=0;i<hs.length;i++){
    hs[i].onclick=function(){
     if(this.parentNode.className!="show"){
            this.parentNode.className="show";
            if(prev && prev!=this.parentNode) prev.className="hide";
            prev=this.parentNode;
            }
        else this.parentNode.className="hide";
	}
  }
}

function BuildListId(id){
	 document.getElementById("nav").className="jsenable";
	var hs=document.getElementById("nav").getElementsByTagName("h3");

for(var i=0;i<hs.length;i++){
    hs[i].onclick=function(){
    	hs[id].parentNode.className="hide";
    if(this.parentNode.className!="show"){
     		this.parentNode.className="show";
            if(prev && prev!=this.parentNode) prev.className="hide";
            prev=this.parentNode;
            }
        else this.parentNode.className="hide";
	 
	}
  }
   hs[id].parentNode.className="show";
    //hs[id].parentNode.parentNode.display="block";
}