Remove Delete Button for Wrong User? - php

Question

I currently have a guestbook style thing that users post comments. Their username is stored in a cookie when logged on, and when a post is submitted their username is stored alongside their post in a mySQL database. I'm trying to remove the delete button next to the comment if the user logged in is not the one that posted it. Here is the nonworking code:
<?php
$username = $_COOKIE['sqlusername'];
mysqlLogin();
$sql = mysql_query("SELECT * FROM `posts`");
$sqlCnt = mysql_num_rows($sql);
if($sqlCnt != 0) {
echo "<table align='center'><tr><td class='tdno'><u><H4>Message</H4></u></td><td class='tdno'><u><H4>Poster</H4></u></td><td class='tdno'><u><H4>Time</H4></u></td></tr>";
while($row = mysql_fetch_array($sql)) {
if($row['username'] != $username) {
echo "<script type=\"text/javascript\">";
echo "document.getElementById('delete').innerHTML = \"\";";
echo "</script>";
}
$id = $row['id'];
echo "<form action='delete.php' method='POST'>";
echo "<tr><td>";
echo $row['message'];
echo "</td><td>";
echo $row['poster'];
echo "</td><td align='center' width='10'>";
echo $row['date'];
echo "<td align='left' width='1'>";
echo "<input type='hidden' name='id' value='$id'>";
echo "<span id='delete'><input type='submit' class='submit' value='Delete'></span>";
echo "</td></tr>";
echo "</form>";
}
echo "</table>";
} else {
echo "<div align='center'>Sorry, no posts found!</div>";
}
?>
Any thoughts?

Answer 1

Try:
if ($username == $row['poster']) {
echo "<input type='hidden' name='id' value='$id'>";
echo "<span id='delete'><input type='submit' class='submit' value='Delete'></span>";
} else {
echo " "
}

Answer 2

maybe its the issue with your browser and javascript. Try this :
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById(id).style.display = 'none';
}
else {
if{ // IE 4
document.all.id.style.display = 'none';
}
}
else your logic looks fine(assuming you are storing the username and posts properly in database.)