// crea l'oggetto per la comunicazione AJAX con il server
// compatibile con tutti i browser che supportano AJAX
function crea_http_req() {
	var req = false;
	if (typeof XMLHttpRequest != "undefined")
		req = new XMLHttpRequest();
	if (!req && typeof ActiveXObject != "undefined") {
		try {
			req=new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				req=new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e2) {
				try {
					req=new ActiveXObject("Msxml2.XMLHTTP.4.0");
				} catch (e3) {
					req=null;
				}
			}
		}
	}

	if(!req && window.createRequest)
		req = window.createRequest();

	if (!req) alert("Il browser non supporta AJAX");

	return req;
}

function populate_combo(i) {
	var xmlhttp = crea_http_req();
	
	var pars = '';
		pars += 'prov=' + document.forms[i].provincia.value;
	
	document.getElementById('label_comune').innerHTML = "<img src=\"/i/loading.gif\" alt=\"\" title=\"\" style=\"margin: 3px 0px 3px 50%;\" />";
	xmlhttp.onreadystatechange=function() {
  		if (xmlhttp.readyState==4) {
			document.getElementById('label_comune').innerHTML = xmlhttp.responseText;
   		}
  }
 xmlhttp.open("POST", "./popola_comuni.aspx", true);
 xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
 xmlhttp.setRequestHeader("Content-length", pars.length);
 xmlhttp.setRequestHeader("Connection", "close");
 xmlhttp.send(pars);
}

function view(i) {
	if (document.forms[0].nazione.value == "1") {
		document.getElementById('show').style.display = 'block';
		document.getElementById('show').style.visibility = 'visible';
	}
	else
	{
		document.getElementById('show').style.display = 'none';
		document.getElementById('show').style.visibility = 'hidden';
	}
}