//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";
}


function BuildMenu(){
	document.write("<ul><li><a href='../Listprova.html'>Home Page</a></li></ul>");
	document.write("<ul><li><h3 id=0>Contenuti e Web Writing</h3>");
    document.write("<ul><li><a href='../pag1.html'>Web Writing</a></li><li><a href='../pag2.html'>Architettura dell' informazione</a></li>");
  	document.write("</ul></li><li><h3 id=1>Grafica</h3>");
   	document.write("<ul><li><a href='../pag3.html'>Teoria Grafica</a></li>");
	document.write("<li><a href='#'>Corel Draw</a></li><li><a href='#'>Fireworks</a></li><li><a href='#'>Altri software</a></li>");
	document.write("</ul></li><li><h3 id=2>Leggi e lavoro</h3>");
	document.write("<ul><li><a href='../pag4.html'>Leggi</a></li><li><a href='#'>Lavoro</a></li>");
  	document.write("</ul></li><li><h3 id=3>Linguaggi</h3>");
    document.write("<ul><li><a href='../pag5.html'>DHTML</a></li><li><a href='#'>Linguaggi emergenti</a></li>");
    document.write("<li><a href='#'>CSS</a></li><li><a href='#'>Javascript</a></li><li><a href='#'>Web Semantico</a></li>");
   	document.write("</ul></li><li><h3 id=4>Multimedia e 3D</h3>");
    document.write("<ul><li><a href='../pag6.html'>3D</a></li><li><a href='#'>Video per il web</a></li>");
 	document.write("</ul></li></ul>");
}