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

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

function BuildList()
{
	var prev= null;
	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";
					
					
					
				}
		}
}