// Create the XML HTTP request object. We try to be
// more cross-browser as possible.
function CreateXmlHttpReq(handler) {
  var xmlhttp = null;
  try {
    xmlhttp = new XMLHttpRequest();
    try {
        // Fix for some version of Mozilla browser.
        http_request.overrideMimeType('text/xml');
    } catch(e) {
    }
  } catch(e) {
    try {
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
  xmlhttp.onreadystatechange = handler;
  return xmlhttp;
}

// An handler that does nothing, used for AJAX requests that
// don't require a reply and are non-critical about error conditions.
function DummyHandler() {
    return true;
}

// Shortcut for creating a GET request and get the reply
// This few lines of code can make Ajax stuff much more trivial
// to write, and... to avoid patterns in programs is sane!
var ajax_req = null;

function ajaxGet(url,handler) {
    var a = new Array("placeholder");
    for (var j=2; j<arguments.length; j++) {
        a[a.length] = arguments[j];
    }
    var myhandler = function() {
        var content = ajaxOk();
        if (content !== false) {
            a[0] = content;
            try {
                return handler.apply(this, a);
            } catch(e) {
                return myDummyApply(handler, a);
            }
        }
    }
    ajax_req = CreateXmlHttpReq(myhandler);
    ajax_req.open("GET",url);
    ajax_req.send(null);
}

// IE 5.0 does not support the apply() method of the function object,
// we resort to this eval-based solution that sucks because it is not
// capable of preserving 'this' and is ugly as hell, but it works for us.
function myDummyApply(funcname,args) {
    var e = "funcname(";
    for (var i = 0; i < args.length; i++) {
        e += "args["+i+"]";
        if (i+1 != args.length) {
            e += ",";
        }
    }
    e += ");"
    return eval(e);
}

// Add a random parameter to the get request to avoid
// IE caching madness.
function ajaxGetRand(url,handler) {
    url += (url.indexOf("?") == -1) ? "?" : "&";
    url += "rand="+escape(Math.random());
    arguments[0] = url;
    try {
        return ajaxGet.apply(this,arguments);
    } catch(e) {
        return myDummyApply(ajaxGet,arguments);
    }
}

function ajaxOk() {
    if (ajax_req.readyState == 4 && ajax_req.status == 200) {
        return ajax_req.responseText;
    } else {
        return false;
    }
}


var request = false; 
function securityCodeCheckHandler() { 
 
if (request.readyState == 4 && request.status == 200) { 
var response = request.responseText;
if (response.indexOf("OK") != -1) { 
document.contatti.submit(); 
} 
else {
alert("Codice di sicurezza errato!"); 
ableButtonId();
xwarnField("qcode","contatti"); 
} } }

function generalAjaxHandler(field,message,onErrorFunction,onSuccessFunction) { 
	if (request.readyState == 4 && request.status == 200) 
	{ 
	var response = request.responseText;
	//alert(response);
	if (response.indexOf("OK") != -1) {
	onSuccessFunction(); } 
	else { 
	if (onErrorFunction == null) { alert(message); xwarnField('qcode',"contatti"); } 
	else {
	onErrorFunction(); 
	} 
		ableButtonId(); 
	} 
} } 


function checkSecurityCode() { 
var myfunc = function() { 
generalAjaxHandler("code","Codice di sicurezza errato!",null, submitForm2) } 
request = CreateXmlHttpReq(myfunc);
request.open("GET","/checkcode.php?do=verify&session_code="+document.contatti.sessione.value+"&code="+document.contatti.code.value+"&rand="+escape(Math.random()));
request.send(null); } 

function submitForm2() {
document.contatti.submit();
}

function check_form_contatti() {
disableButtonId("contattiButtonx");
	var xnumadulti = 0;
	var i = 0;
	if (!validateForm(document.contatti.Nome.value, "^.*[^ ]+.*$", "Il nome non puo' contenere caratteri speciali o essere vuoto","Nome","contatti"))
	{
	ableButtonId();
	xwarnField("Nome","contatti"); 
	document.getElementById("errorboxcontatti").innerHTML='<br /><div style="border:1px solid #FF0000;"><p><b>Per proseguire occore inserire almeno il nome</b></p></div>'; 
	return false;
	}
	if (!validateForm(document.contatti.Cognome.value, "^.*[^ ]+.*$", "Il cognome non puo' contenere caratteri speciali o essere vuoto","Cognome","contatti"))
	{
	ableButtonId();
	xwarnField("Cognome","contatti"); 
	document.getElementById("errorboxcontatti").innerHTML='<br /><div style="border:1px solid #FF0000;"><p><b>Per proseguire occore inserire il cognome</b></p></div>'; 
	return false;
	}

	if (!validateForm(document.contatti.msg.value, "^.*[^ ]+.*$", "Il messaggio non puo' contenere caratteri speciali o essere vuoto","msg","contatti"))
	{
	ableButtonId();
	xwarnField("msg","contatti"); 
	document.getElementById("errorboxcontatti").innerHTML='<br /><div style="border:1px solid #FF0000;"><p><b>Per proseguire occore inserire un messaggio</b></p></div>'; 
	return false;
	}

	if (!isValidEmail(document.contatti.Email.value)) { 
	ableButtonId();
	xwarnField("Email","contatti"); 
	document.getElementById("errorboxcontatti").innerHTML='<br /><div style="border:1px solid #FF0000;"><p><b>Email non valida.</b></p></div>'; 
	return false; 
	}
	if (checkSecurityCode()) {

		return false; 
	}
	
}
function disableButtonId(){
document.getElementById("contattiButtonx").disabled=true;
document.getElementById("contattiButtonx").innerHTML="Attendere..."; 
}
function ableButtonId(id){
document.getElementById("contattiButtonx").disabled=false;
document.getElementById("contattiButtonx").innerHTML='<input  type="button" class="contatti" onclick="javascript:check_form_contatti();return false;" value="Invia" />'; 
}