function verifycontact() {
var themessage = "U heeft de volgende velden niet ingevuld: ";
if (document.contact.Naam.value=="") {
themessage = themessage + " - Naam";
}
if (document.contact.Telefoon.value=="") {
themessage = themessage + " -  Telefoon";
}
if (document.contact.email.value=="") {
themessage = themessage + " -  Email";
}

//alert if fields are empty and cancel form submit
if (themessage == "U heeft de volgende velden niet ingevuld: ") {
document.contact.submit();
}
else {
alert(themessage);
return false;
   }
}



function verifycontacteng() {
var themessage = "Please fill in the mandatory fields: ";
if (document.contacteng.Naam.value=="") {
themessage = themessage + " - Name";
}
if (document.contacteng.Adres.value=="") {
themessage = themessage + " - Address";
}
if (document.contacteng.Postcode.value=="") {
themessage = themessage + " - Zip Code";
}
if (document.contacteng.Plaats.value=="") {
themessage = themessage + " - City";
}
if (document.contacteng.Land.value=="") {
themessage = themessage + " - Country";
}
if (document.contacteng.Telefoon.value=="") {
themessage = themessage + " -  Phone Number";
}
if (document.contacteng.email.value=="") {
themessage = themessage + " -  Email-address";
}

//alert if fields are empty and cancel form submit
if (themessage == "Please fill in the mandatory fields: ") {
document.contacteng.submit();
}
else {
alert(themessage);
return false;
   }
}



function verifyacc() {
var themessage = "U heeft de volgende velden niet ingevuld: ";
if (document.acc.Naam.value=="") {
themessage = themessage + " - Naam";
}
if (document.acc.Adres.value=="") {
themessage = themessage + " - Adres";
}
if (document.acc.Postcode.value=="") {
themessage = themessage + " - Postcode";
}
if (document.acc.Plaats.value=="") {
themessage = themessage + " - Plaats";
}
if (document.acc.Telefoon.value=="") {
themessage = themessage + " -  Telefoon";
}
if (document.acc.email.value=="") {
themessage = themessage + " -  Email";
}

//alert if fields are empty and cancel form submit
if (themessage == "U heeft de volgende velden niet ingevuld: ") {
document.acc.submit();
}
else {
alert(themessage);
return false;
   }
}