first off, i highly recommend that you do NOT name your tables with a month/year like you have in your update query.
the better thing to do is simply add a 'time' field to your blog table for each entry.
the code example below does not reflect that change, but here is how i think your page should be setup.
note: this assumes that the entryid variable was sent from the previous page with the POST method. If you use the GET method ( in the url ) you will need to modify it a bit.
PHP Code:
<?
// connect & select
$lnk = mysql_connect('mysqladdress', 'login', 'password') or die (mysql_error());
mysql_select_db('dbname',$lnk);
// handle update
// here we test for the post variable action. this is better than
// testing for $submit because if the user presses 'enter' instead of clicking
// the button 'submit', then the variable 'submit' would not get sent.
// see the form below to see the hidden variable 'action'
if ($_POST['action']=="update") {
$updquery = "UPDATE may2004 SET title='".$_POST['newtitle']."',entry='".$_POST['newentry']."'
WHERE id='".$_POST['entryid']."'";
mysql_query($updquery) or die(mysql_error());
echo("<p>Your entry has been updated.</p>");
}
// define sql
$sql = "SELECT title,entry from table where entryid='".$_POST['entryid']."'";
// execute query
$result = mysql_query($query_title) or die(mysql_error());
// since the entryid field is unique, and it is only possible to have
// one result, then we can use 'if' instead of 'while' to assign the
// result row to the array variable $row
if($row = mysql_fetch_array($result)){
// notice the 2 hiden variables we have in the form.
// 'action' and 'entryid'
echo "<form method=\"post\" action=\"".$PHP_SELF."\">
<input type=\"hidden\" name=\"action\" value=\"update\">
<input type=\"hidden\" name=\"entryid\" value=\"".$_POST['entryid']."\">
<input type=\"text\" name=\"newtitle\" value=\"".stripslashes($row['title']."\">
<br />
<textarea name=\"newentry\" rows=\"10\" cols=\"70\">
".stripslashes($row['entry']."
</textarea>
<br />
<input type=\"Submit\" name=\"submitentry\" value=\"submit\">
</form>";
} else {
// this will show if the entry id is not valid
echo "invalid id';
}
?>