function checknewsletter ( form )
{
 	if (form.vorname.value == "") {
        alert( "Fill in the vorname." );
        form.vorname.focus();
        return false ;
    }
	if (form.nachname.value == "") {
        alert( "Fill in the nachname." );
        form.nachname.focus();
        return false ;
    }
		if (form.email.value == "") {
        alert( "Fill in the Email." );
        form.email.focus();
        return false ;
    }
	return true ;
}