function show_hidden_div(id){
    close_all(id);
    var div = document.getElementById(id);
    if (div.style.display == "block")
        div.style.display = "none";
    else
        div.style.display = "block";
}

function close_all(id){
switch(id){
    case"europe" :
        document.getElementById('american').style.display = "none";
        document.getElementById('canadian').style.display = "none";
        break;
    case "american" :
        document.getElementById('europe').style.display = "none";
        document.getElementById('canadian').style.display = "none";
        break;
    case "canadian" :
        document.getElementById('europe').style.display = "none";
        document.getElementById('american').style.display = "none";
        break;

}
}

function checkdata(){
	var email = document.getElementById('email').value
	var filter=/^\w+((-\w+)|(\.\w+))*\@\w+((\.|-)\w+)*\.\w+$/
    var errore = document.getElementById("error");
	var msg = "";
	if (email.search(filter) == -1)
	{
		msg += 'Insert a valide email.<br/>';
	}
    if (document.getElementById('name').value == "" || document.getElementById('surname').value == ""){
        msg += 'The fields red (*) are mandatory.<br/>';
    }
    
	if (msg != '')
	{
        errore.style.display = "block";
		errore.innerHTML = msg;
		return false;
	}
	else
	{
		return true;
	}
}