Ben bir php komut dosyası içinde bir form yaşıyorum. Ben javascript kullanarak doğrulama yapıyorum.

<?php

$con = mysql_connect("servername","login","passsword");
if (!$con)
    {
        die('Could not connect: ' . mysql_error());
    }

mysql_select_db("dbadminatms", $con);

if (isset($_POST['email']) && isset($_POST['name']) && isset($_POST['comments']))
{
    $sql="INSERT INTO feedback_comments (posted_by, email, comments_text, comment_date)
        VALUES
    ('$_POST[name]','$_POST[email]','$_POST[comments]',NOW())";
    $emailID = $_POST['email'];
    $postedBy = $_POST['name'];
    $message = $_POST['comments'];

    if (!mysql_query($sql,$con))
    {
        die('Error: ' . mysql_error());
    }
    else
    {
        mail( "aaa@bbb.coml.com", "Subject: Comments", $message, "From: $emailID\r\n $postedBy" );
    }
}
    else
{

echo '


<form action="contactus.php" method="POST" id="feedback" onsubmit="javascript:return validate("feedback","name","email","comments");">

                <p id="errorMsg">All fields are required</p>

                <label for="name" class="label" id="nameLabel">Your name: </label><input id="name" type="text" size="30"  name="name" class="field"/>
                <br /><br />
                <label for="email" class="label" id="emailLabel">Your Email id: </label><input id="email" type="text" size="30"  name="email" class="field"/>
                <br /><br />

                    <label for="comments" class="label" id="commentsLabel">Comments:</label>
                  <div id="commentsSection">
                    <textarea name="comments" id="comments" class="ui-corner-all" cols="9" rows="5" tabindex="140"></textarea>
                  </div>

            <p><input type="submit" value="Submit" id="submit"/>&nbsp;<input type="reset" /></p>

        </form>';
}

    mysql_close($con);
?>

Everrything yolunda çalışıyor ama ben javascript kullanarak formu doğrulamak olamaz.