function submitCareerForm(form) {
    var doSubmit = true;
    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.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.position.value == "") {
        document.getElementById("form_err_position").style.display = "block";
        form.position.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;
    }
    return doSubmit;
}