function validateForm() {
with (document.reservering) {
var alertMsg = "U bent vergeten onderstaande gegevens in te vullen:\n";
if (naam.value == "") alertMsg += "\nNaam";
radioOption = -1;
for (counter=0; counter<titel.length; counter++) {
if (titel[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nTitel";
if (adres.value == "") alertMsg += "\nAdres";
if (postcode.value == "") alertMsg += "\nPostcode";
if (woonplaats.value == "") alertMsg += "\nWoonplaats";
if (telefoon.value == "") alertMsg += "\nTelefoonnummer";
radioOption = -1;
for (counter=0; counter<hond.length; counter++) {
if (hond[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nWel of geen hond";
if (aantal9plus.value == "") alertMsg += "\nAantal personen ouder dan 9 jaar";
if (aantal7tot9.value == "") alertMsg += "\nAantal personen van 7 tot en met 9 jaar";
if (aantal0tot6.value == "") alertMsg += "\nAantal personen van 0 tot en met 6 jaar";
radioOption = -1;
for (counter=0; counter<accomodatie.length; counter++) {
if (accomodatie[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nType accommodatie";
radioOption = -1;
for (counter=0; counter<auto.length; counter++) {
if (auto[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nAuto";
radioOption = -1;
for (counter=0; counter<motor.length; counter++) {
if (motor[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nMotor of bromfiets";
radioOption = -1;
for (counter=0; counter<electra.length; counter++) {
if (electra[counter].checked) radioOption = counter;
}
if (radioOption == -1) alertMsg += "\nElectra";
if (aankomst.value == "") alertMsg += "\nDatum aankomst";
if (vertrek.value == "") alertMsg += "\nDatum vertrek";
if (alertMsg != "U bent vergeten onderstaande gegevens in te vullen:\n") {
alert(alertMsg);
return false;
} else {
return true;
} } }