如何验证动态创建的表的每一行？

I would like to validate each select option for each row of my dynamically created table.

I tried to do a for loop but it is only getting the value of the first row. Here is my code:

function GetCellValues() {
    var table = document.getElementById('criteriatbl');
    for (var r = 1, n = table.rows.length; r < n; r++) {
        var results = document.getElementById("results");
        var strRes = results.options[results.selectedIndex].text;
        alert(strRes);
    }
}

html table

<table border="1" width="" id='criteriatbl'>
        $i = 0;
        foreach($result as $criteria) {
            $i+=1;
           echo 
           "
            <tr><td align='center'>$i</td>
                <td align='center'> <label for='criteria'> $criteria->catID </label></td>
                <td>$criteria->category</td>
                <td style='word-wrap: break-word'>$criteria->critDesc</td>
                <td><select id='results' name='results[]'> 
                <option value='Select'>Select</option>
                <option value='Compliant'>Compliant</option>
                <option value='OFI'>OFI</option>
                <option value='AOC'>AOC</option>
                <option value='MinorNC'>Minor NC</option>
                <option value='MajorNC'>Major NC</option>
                <option value='NA'>NA</option>
                </select> </td>
                <td> <textarea name='comment[]' value='comment' rows='7' cols='45' placeholder='write something here'></textarea></td></tr>
            ";

        }
?>
            </table>

At each row I should be getting the value of each of the selected option by the user.