var xmlhttp;

function envia(){
    var doc = document.cadastre;
    var nome = doc.nome.value;
    var email = doc.email.value;
    var sendmail = '';
    
    if( doc.checkbox.checked )
    {
        sendmail = 1;
    }
    else
    {
        sendmail = 0;
    }
    
    xmlhttp=GetXmlHttpObject();
    if (xmlhttp==null){
        alert ("Your browser does not support AJAX!");
        return;
    }
    
    var url="inc/home_form.php";
    url=url+"?nome="+nome+"&email="+email+"&send="+sendmail;
    xmlhttp.onreadystatechange=stateChanged;
    xmlhttp.open("GET",url,true);
    xmlhttp.send(null);
    return false;
}

function stateChanged(){
    if (xmlhttp.readyState<3){
        document.getElementById("containerAjax").innerHTML='enviando';
    }
    if (xmlhttp.readyState==4){
        document.getElementById("containerAjax").innerHTML=xmlhttp.responseText;
    }
}

function GetXmlHttpObject(){
    if (window.XMLHttpRequest){
        // code for IE7+, Firefox, Chrome, Opera, Safari
        return new XMLHttpRequest();
    }
    if (window.ActiveXObject){
        // code for IE6, IE5
        return new ActiveXObject("Microsoft.XMLHTTP");
    }
    return null;
}