Veld hiden/tonen

//Veld hiden
crmForm.all.new_datetocontact_c.style.display = 'none';
crmForm.all.new_datetocontact_d.style.display = 'none';


//Veld tonen
crmForm.all.new_datetocontact_c.style.display = 'block';
crmForm.all.new_datetocontact_d.style.display = 'block';