var display_url=0
var id_pref1;
var id_utente1
var div;
var http_request = false;

  function makeRequest(id_utenti,id_pref,livello,action) {
    id_pref1 = id_pref;
    id_utenti1 = id_utenti;
    div = livello;
    http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
      http_request = new XMLHttpRequest();
      if (http_request.overrideMimeType) {
        http_request.overrideMimeType('text/xml');
      }
    } 
    else if (window.ActiveXObject) { // IE
      try {
        http_request = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
    }

    if (!http_request) {
      alert('Giving up :( Cannot create an XMLHTTP instance');
      return false;
    }
    
    url = "../utente/aggiungiUtentiPreferiti.php?action="+action+"&id_utenti_pref="+id_pref1+"&id_utenti="+id_utenti1;
    http_request.onreadystatechange = alertContents;
    
    http_request.open('GET', url, true);
    http_request.send(null);
  }

  
  
  
  function makeRequestPreferiti(livello,action,id_utenti) {
    div = livello;
    http_request = false;
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
      http_request = new XMLHttpRequest();
      if (http_request.overrideMimeType) {
        http_request.overrideMimeType('text/xml');
      }
    } 
    else if (window.ActiveXObject) { // IE
      try {
        http_request = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e) {}
      }
    }

    if (!http_request) {
      alert('Giving up :( Cannot create an XMLHTTP instance');
      return false;
    }
    
    url = "../utente/selectPreferiti.php?action="+action+"&id_utenti="+id_utenti;
    http_request.onreadystatechange = alertContents;
    
    http_request.open('GET', url, true);
    http_request.send(null);
  }
  
  
  
  
  function alertContents() {
    if (http_request.readyState == 4) {
      if (http_request.status == 200) {
        var xmldoc = http_request.responseText;
        document.getElementById(div).innerHTML = xmldoc;  
      } else {
        alert('There was a problem with the request.');
      }
    }
  }