// JavaScript Document
function checkform ( form ){
     if (form.naam.value == "") {
        alert( "Vul uw naam in." );
        form.naam.focus();
        return false ;
    }
    if (form.adres.value == "") {
        alert( "Vul je adres in." );
        form.adres.focus();
        return false ;
    }
    if (form.postcode.value == "") {
        alert( "Vul je postcode in." );
        form.postcode.focus();
        return false ;
    }
        if (form.plaats.value == "") {
        alert( "Vul je plaats in." );
        form.plaats.focus();
        return false ;
    }
        if (form.land.value == "") {
        alert( "Vul je land in." );
        form.land.focus();
        return false ;
    }
        if (form.email.value == "") {
        alert( "Vul je email in." );
        form.email.focus();
        return false ;
    }
    if (form.bank.value == "") {
        alert( "Vul je bank in." );
        form.bank.focus();
        return false ;
    }
    if (form.bank_rekening.value == "") {
        alert( "Vul je bankrekening in." );
        form.bank_rekening.focus();
        return false ;
    }
    if (form.bank_rekening_naam.value == "") {
        alert( "Vul naam rekeninghouder in." );
        form.bank_rekening_naam.focus();
        return false ;
    }
    return true ;
}