function ContactControle(){
                var Foutmelding = '';
                submitOK='True';

                if (document.ContactFormulier.Achternaam.value.length==0){
                               Foutmelding = Foutmelding + '- Name.\n';
                               document.ContactFormulier.Achternaam.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.Achternaam.style.border = '1px solid #000000';
                }
                if (document.ContactFormulier.Onderwerp.value.length==0){
                               Foutmelding = Foutmelding + '- Subject.\n';
                               document.ContactFormulier.Onderwerp.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.Onderwerp.style.border = '1px solid #000000';
                }
                if (document.ContactFormulier.Bericht.value.length==0){
                               Foutmelding = Foutmelding + '- Message.\n';
                               document.ContactFormulier.Bericht.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.Bericht.style.border = '1px solid #000000';
                }

                if (document.ContactFormulier.Email.value.length==0){
                               Foutmelding = Foutmelding + '- Email.\n';
                               document.ContactFormulier.Email.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.Email.style.border = '1px solid #000000';
                }

                if (document.ContactFormulier.ToolstationNummer.value.length==0){
                               Foutmelding = Foutmelding + '- Toolstation Number.\n';
                               document.ContactFormulier.ToolstationNummer.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.ToolstationNummer.style.border = '1px solid #000000';
                }
 
                if (document.ContactFormulier.RoninDealer.value.length==0){
                               Foutmelding = Foutmelding + '- Ronin Dealer.\n';
                               document.ContactFormulier.RoninDealer.style.border = '1px solid #ff0000';
                               submitOK='False';
                }
                else{
                               document.ContactFormulier.RoninDealer.style.border = '1px solid #000000';
                }                
                if (submitOK=='False'){
                							alert('You are required to fill out the following fields:\n' + Foutmelding);

                               return false;
                }
};