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

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