function controlloCampi(nome, pwd, contrpwd,regione,citta,provincia){
	   if(nome=='') {
		alert('Inserire il nome...');
		return;
	   }
	   else if(pwd.length<4){
		alert('Password minore di 4 caratteri');
		return;	   
	   }
	   else if(pwd!=contrpwd) {
		alert('Confronto inesatto');
		return;
	   }

   
   
   makeRequest('iscrizione.php','?nome='+nome+'&pwd='+pwd+'&regione='+regione+'&citta='+citta+'&provincia='+provincia,'myspan')
   }
   
   function makeRequest(url, parameters,form) {
//alert(url+" "+parameters+" "+form)
   var http_request = false;

      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } 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('Cannot create XMLHTTP instance');
         return false;
      }
      http_request.open('GET', url + parameters, true);
	  http_request.onreadystatechange = function() { alertContents(form,http_request); };;
      http_request.send(null);
   }

   function alertContents(form,http_request) {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById(form).innerHTML = (result);            
         } else {
            alert('Status della pagina ' + http_request.status+"\nErrore: "+http_request.responseText);
         }
      }
   }
   
   function get(obj) {
      var getstr = "?";
      for (i=0; i<obj.childNodes.length; i++) {
         if (obj.childNodes[i].tagName == "INPUT") {
            if (obj.childNodes[i].type == "text") {
               getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
            }
            if (obj.childNodes[i].type == "checkbox") {
               if (obj.childNodes[i].checked) {
                  getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
               } else {
                  getstr += obj.childNodes[i].name + "=&";
               }
            }
            if (obj.childNodes[i].type == "radio") {
               if (obj.childNodes[i].checked) {
                  getstr += obj.childNodes[i].name + "=" + obj.childNodes[i].value + "&";
               }
            }
         }   
         if (obj.childNodes[i].tagName == "SELECT") {
            var sel = obj.childNodes[i];
            getstr += sel.name + "=" + sel.options[sel.selectedIndex].value + "&";
         }
         
      }
      makeRequest('get.php', getstr);
   }