function checkForm() {

        CompanyFo = document.getElementById ? document.getElementById('foCompany') : noName.all.foCompany;
        NameFo    = document.getElementById ? document.getElementById('foName') : noName.all.foName;
        EmailFo   = document.getElementById ? document.getElementById('foEmail') : noName.all.foEmail;
        PhoneFo   = document.getElementById ? document.getElementById('foPhone') : noName.all.foPhone;
        ContFo    = document.getElementById ? document.getElementById('foCont') : noName.all.foCont;

        if (CompanyFo.value == 0 || NameFo.value == 0 || EmailFo.value == 0 || PhoneFo.value == 0 || ContFo.value == 0) {
            alert('Błąd!!!\n\rProsimy wypełnić wszystkie pola.');
            return false;
            }
        else {
            form_mail = document.getElementById ? document.getElementById('foEmail') : document.all.foEmail; 
            } 

      }