// AJAX Script per caricamento asincrono delle pagine

function makeHttpRequest(url, callback_function, divid, mode, parameters) {

   var http_request = false;
   var return_xml = false;

   if (window.XMLHttpRequest) {
       http_request = new XMLHttpRequest();
       if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/xml');
       }
   } else if (window.ActiveXObject) {
       try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
           try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
       }
   }

   if (!http_request) {
       alert('Sfortunamante il tuo browser non supporta questa funzione.');
       return false;
   }

   http_request.onreadystatechange = function() {
       if (http_request.readyState == 4) {
           if (http_request.status == 200) {
               if (return_xml) {
                   eval(callback_function + '(http_request.responseXML, divid)');
               } else {
                   eval(callback_function + '(http_request.responseText, divid)');
               }
           } else {
               alert('Errore rilevato durante la richiesta.(Errore: ' + http_request.status + ')');
           }
       }
   }

   if (mode == "POST") {
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   } else {
      http_request.open('GET', url, true);
      http_request.send(null);
   }
}

function setContents(text, divid) {

   divid=document.getElementById(divid);
   if (divid.innerHTML != text) {
      divid.innerHTML = text;
   }

}

// Javascript per aprire le finestre di popUp
var popUpWin=0;

function popUpWindow(URLStr, w, h)
{
  if(popUpWin)
  {
    if(!popUpWin.closed) popUpWin.close();
  }
  var l = Math.floor((screen.width-w)/2);
  var t = Math.floor((screen.height-h)/2);
  var settings = "scrollbars,width="+w+",height="+h+",left="+l+", top="+t+",screenX="+l+",screenY="+t;
  popUpWin = open(URLStr, 'popUpWin', settings);
}