function PreparaDati(){
  stringa = "";
  var form = document.forms[0];
  var numeroElementi = form.elements.length;
 
  for(var i = 0; i < numeroElementi; i++){
    if(i < numeroElementi-1){
      stringa += form.elements[i].name+"="+encodeURIComponent(form.elements[i].value)+"&";
    }else{
      stringa += form.elements[i].name+"="+encodeURIComponent(form.elements[i].value);
    } 
  }
}

function AJAXReq(method,url,bool,divid){
  if(window.XMLHttpRequest){
    myReq = new XMLHttpRequest();
  } else
 
  if(window.ActiveXObject){
    myReq = new ActiveXObject("Microsoft.XMLHTTP");
   
    if(!myReq){
      myReq = new ActiveXObject("Msxml2.XMLHTTP");
    }
  }
 
  if(myReq){
    execfunc(method,url,bool,divid);
  }else{
    alert("Impossibilitati ad usare AJAX");
  }
}

function execfunc(method,url,bool,divid){
  myReq.onreadystatechange = handleResponse;
  myReq.open(method,url,bool);
  myReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
  myReq.send(stringa);
  id_name = divid
}

function InviaDati_GET(page,divid){
  PreparaDati();
  AJAXReq("GET",page,true,divid);
}

function InviaDati(page,divid){
  PreparaDati();
  AJAXReq("POST",page,true,divid);
}

function handleResponse(){
  if(myReq.readyState == 4){
    if(myReq.status == 200){
		document.getElementById(id_name).innerHTML = myReq.responseText;
		 // alert(myReq.responseText);

    }else{
      alert("Niente da fare, AJAX non funziona :(");
    }
  }
}