function Polling(secondi,contatore,banner)
{
	var cTicks = parseInt(secondi);
	var resetta = parseInt(secondi);
	if(document.getElementById(banner)!=null)
	{
	var timer = setInterval(function(){
	   var ex = document.getElementById(contatore);
	   var e = document.getElementById(banner);
		if( cTicks )
	   {
			secondi = --cTicks;
			ex.innerHTML = secondi
		} else {
			cTicks=resetta;
			ex.innerHTML = resetta;
			e.innerHTML = e.innerHTML
		}
		}, 1000);
	}
}





function Mid(String, Start, Length)
{
    if (String == null)
        return (false);
    
    if (Start > String.length)
        return '';
    
    if (Length == null || Length.length == 0)
        return (false);
    
    return String.substr((Start - 1), Length);
}


function InStr(String1, String2)
{
    var a = 0;
    
    if (String1 == null || String2 == null)
        return (false);
    
    String1 = String1.toLowerCase();
    String2 = String2.toLowerCase();
    
    a = String1.indexOf(String2);
    if (a == -1)
        return 0;
    else
        return a + 1;
}

function Len(string)
{
    if (string == null)
        return (false);
    
    return String(string).length;
}


var xmlhttp

function loadXMLDoc(url)
{
// codice per Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  xmlhttp.onreadystatechange=xmlhttpChange
  xmlhttp.open("GET",url,true)
  xmlhttp.send(null)
  }
// codice per  IExplore
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
    if (xmlhttp)
    {
    xmlhttp.onreadystatechange=xmlhttpChange
    xmlhttp.open("GET",url,true)
    xmlhttp.send()
    }
  }
}

function xmlhttpChange()
{
// if xmlhttp shows "loaded"
if (xmlhttp.readyState==4)
  {
  // if "OK"
  if (xmlhttp.status==200)
    {
    // ...il vostro codice...
	var TARG_ID = "POLLING";
	var e = document.getElementById(TARG_ID);
	e.innerHTML = xmlhttp.responseText
    }
  else
    {
    alert("Impossibile ricevere i dati")
    }
  }
}