fields = 0;
    function addInput() {
    if (fields != 10) {
    document.getElementById('text').innerHTML += "<tr><td style='width: 200px'><LABEL for='cert"+fields+"'>Soubor certifikatu: </LABEL><br /><LABEL for='cert_text_"+fields+"'>Popis: </LABEL>     </td><td><INPUT type='file' size='40' name='cert"+fields+"'><br />   <INPUT type='text' name='cert_text_"+fields+"' id='cert_text_"+fields+"' value=''>   </td></tr>   ";
    
    fields += 1;
    } else {
    document.getElementById('text').innerHTML += "<br />Only 10 upload fields allowed.";
    document.form.add.disabled=true;
    }
    }