var xmlHttp;
var storia = new Array();
storia = ["vuoto","vuoto","vuoto","vuoto","vuoto"];
var storia_pos = 0;

function showHint(str)
{ 
if (str.length > 0)
{ 
var url=str
xmlHttp=GetXmlHttpObject(stateChanged)
xmlHttp.open("GET", url , true)
xmlHttp.send(null)
aggiungiStoria(str)
} 
else
{ 
document.getElementById("txtHint").innerHTML=""
} 
} 

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("txtHint").innerHTML=xmlHttp.responseText 
} 
} 

function GetXmlHttpObject(handler)
{ 
var objXmlHttp=null

if (navigator.userAgent.indexOf("Opera")>=0)
{
alert("This example doesn't work in Opera") 
return 
}
if (navigator.userAgent.indexOf("MSIE")>=0)
{ 
var strName="Msxml2.XMLHTTP"
if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
{
strName="Microsoft.XMLHTTP"
} 
try
{ 
objXmlHttp=new ActiveXObject(strName)
objXmlHttp.onreadystatechange=handler 
return objXmlHttp
} 
catch(e)
{ 
alert("Error. Scripting for ActiveX might be disabled") 
return 
} 
} 
if (navigator.userAgent.indexOf("Mozilla")>=0)
{
objXmlHttp=new XMLHttpRequest()
objXmlHttp.onload=handler
objXmlHttp.onerror=handler 
return objXmlHttp
}
} 

function showFAQ(form) {

        numsel=form.issue.selectedIndex;
        sel = form.issue.options[numsel].value;
				quest = document.getElementById(sel);

				domande = document.getElementsByTagName('select');
				for (j=0;j<domande.length;j++){
				  if (domande[j].id!=sel&&domande[j].id!='issue'){
				    domande[j].style.display='none';
				  }
				  else {
				    domande[j].style.display='block';
				  }
				}
        lista = quest.options[quest.selectedIndex].value;
        var totale = document.getElementsByTagName('div');
        for (i=0; i<totale.length; i++){
          if (totale[i].id != lista){
            if (totale[i].name == 'risposte'){
              totale[i].style.display = 'none';
              totale[i].vis = false;
            }
          }
          else {
            if (!totale[i].vis){
              totale[i].style.display = 'block';
              totale[i].vis=true;
            }
            else{
              totale[i].style.display = 'none';
              totale[i].vis = false;
            }
          }
        }
			}
function aggiungiStoria(indirizzo){

if (storia_pos==5){
  var lista_temp = new Array();
  for(var i=0;i<4;i++){
    lista_temp[i]=storia[i+1];
  }
  for(var j=0;j<4;j++){
    storia[j]=lista_temp[j];
  }
  storia[4]=indirizzo;
}
else{
  storia[storia_pos]=indirizzo;
  storia_pos++;
  }
}

function backStoria(){
if (storia_pos>1){
storia[storia_pos-1]="vuoto";
storia_pos=storia_pos-2;
showHint(storia[storia_pos]);
}

}