function submitRequestForm(form) {
    var doSubmit = true;
    var country, country_display;
    if (form.country == undefined) {
        country  = document.getElementById("req_f_country");
        firstday = document.getElementById("start_Date");
        lastday  = document.getElementById("end_Date");
        country_display  = country;
        firstday_display = firstday;
        lastday_display  = lastday;
    } else {
        country  = form.country;
        firstday = form.firstday;
        lastday  = form.lastday;
        country_display  = country.previousSibling;
        firstday_display = firstday.previousSibling;
        lastday_display  = lastday.previousSibling;
    }
    if (form.name.value == "") {
        document.getElementById("form_err_name").style.display = "block";
        form.name.className = "form_value error_input"
        doSubmit = false;
    }
    if (form.surname.value == "") {
        document.getElementById("form_err_surname").style.display = "block";
        form.surname.className = "form_value error_input"
        doSubmit = false;
    }
    if (form.company.value == "") {
        document.getElementById("form_err_company").style.display = "block";
        form.company.className = "form_value error_input"
        doSubmit = false;
    }
    if (!form.email.value.match(/[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+/)) {
        document.getElementById("form_err_email").style.display = "block";
        form.email.className = "form_value error_input"
        doSubmit = false;
    }
    if (form.captcha.value == "") {
        document.getElementById("form_err_captcha").style.display = "block";
        form.captcha.className = "form_value error_input"
        doSubmit = false;
    }
    if (form.members.value == "") {
        document.getElementById("form_err_members").style.display = "block";
        form.members.className = "form_value error_input"
        doSubmit = false;
    }
    if (country.value == "" || country.value == "Select…" || country.value == "Выберите…" || country.value == "Виберіть…") {
        document.getElementById("form_err_country").style.display = "block";
        country_display.className = "form_value error_input"
        doSubmit = false;
    }
    if (firstday.value == "") {
        //document.getElementById("form_err_captcha").style.display = "block";
        firstday_display.className = "form_value error_input"
        doSubmit = false;
    }
    if (lastday.value == "") {
        //document.getElementById("form_err_captcha").style.display = "block";
        lastday_display.className = "form_value error_input"
        doSubmit = false;
    }
    if (form.event.value == "") {
        document.getElementById("form_err_event").style.display = "block";
        form.event.className = "form_value error_input"
        doSubmit = false;
    }
    return doSubmit;
}