function check_contact_form(pages_has_blocks_id) {
    var form = 'document.contact_form_' + pages_has_blocks_id;
    if (eval(form).name.value == '')
    {
        alert('You didn\'t fill in your name.');
    }
    else if (eval(form).country.value == '')
    {
        alert('You didn\'t fill in your country.');
    }
    else if (eval(form).email.value == '')
    {
        alert('You didn\'t fill in your email.');
    }
    else if (eval(form).tel.value == '')
    {
        alert('You didn\'t fill in your telephone number.');
    }
    else if (eval(form).question.value == '')
    {
        alert('You didn\'t fill in a question.');
    } else {
        eval(form).submit();
    } 
}