function confirmContactUS() {

    const form = document.getElementById('contactus');
    if (form) {
        var formElements = form.querySelectorAll('input, select');
      };

    const errorText = document.getElementById('errorText');
    const errorTextLine = document.getElementById('errorText');
    if (form) {
        const required = form.checkValidity();
        if (!required) {

        let error = "";
        formElements.forEach(function (element) {
            if (element.required && element.value === '' && element.disabled == false) {
            error += '<li>' + element.name + " " + "is verplicht." + '</li>'
            }
        });

        if (errorText && error !== "") {
            errorTextLine.innerHTML = "";
            errorText.style.display = "block";
            errorTextLine.innerHTML = '<ul>' + error + '</ul>';
        }

        return false;
        }
    }
    const emailValue = document.getElementById("email").value;
    const companyId = document.getElementById("companyName").value;
    const initialValue = document.getElementById("initials").value;
    const firstnameValue = document.getElementById("firstname").value;
    const middlenameValue = document.getElementById("middlename").value;
    const lastnameValue = document.getElementById("lastname").value;
    const streetValue = document.getElementById("differentStreet").value;
    const numberValue = document.getElementById("differentNumber").value;
    const postalcodeValue = document.getElementById("differentZipCode").value;
    const cityValue = document.getElementById("differentCity").value;
    const countryValue = document.getElementById("differentAddressCountry").value;

    $('#SpinnerModalContactUs').modal('show');

    webapi.safeAjax({
        type: "POST",        
        url: "/_api/contacts",
        contentType: "application/json",
        data: JSON.stringify({
            "firstname": firstnameValue,
            "middlename": middlenameValue,
            "lastname": lastnameValue,
            "msdyn_initials": initialValue,
            "emailaddress1": emailValue,
            "cgk_portalcompanyname": companyId,
            "cgk_portalstreet": streetValue,
            "cgk_portalline2": numberValue,
            "cgk_portalzipcode": postalcodeValue,
            "cgk_portalcity": cityValue,
            "cgk_portalcountry": countryValue
        }),
        success: function (res, status, xhr) {           
            window.location.replace("/contact-us/succes/");
        }
    });
}