function check_signup_form(){
	var procedi = true;

	if(document.signup_form.nome.value.length==0){
		procedi = false;
	}

	if(document.signup_form.cognome.value.length==0){
		procedi = false;
	}

	if(document.signup_form.telefono.value.length==0){
		procedi = false;
	}

	if(document.signup_form.email.value.length==0){
		procedi = false;
	}


	if(procedi==true){
		//	Controllo la privacy
		if(document.signup_form.privacy.checked==false){
			alert(signup_form_privacy_missing_error);
		}else{
			document.signup_form.submit();
		}
	}else{
		alert(signup_form_fill_error);
	}
}