Need help with Guestbook script

Hey all. I have this guestbook script:


<?php
			// CONNECT TO DATABASE
			// put your details here
			define ('HOST','freeprohost.com');
			define ('USER', 'vsffc_database' );
			define ('PASS', 'fotball' );
			define ('DB', 'vsffc_database');
			$connection=mysql_connect(HOST, USER, PASS);
			if ($connection){
			mysql_select_db(DB);
			}else{
			echo ('Could Not Connect to Database');
			exit;
			}
			 
			// if name variable exists add it to database THEN display all entries.
			if ($HTTP_POST_VARS['txtName']) {
			// add to database
			$name = stripslashes($HTTP_POST_VARS['txtName']);
			$message = stripslashes($HTTP_POST_VARS['txtMessage']);
			$query = "INSERT INTO guests SET message='$message', name='$name', date=NOW()";
			$result = mysql_query($query);
			}
			?>
			<?
			// DISPLAY CODE GOES HERE
			$query = "SELECT id, name, message, DATE_FORMAT(date, '%d.%m.%y kl. %H:%i') as newdate FROM guests ORDER BY id DESC";
			$result = mysql_query($query);
			while ($row=mysql_fetch_object($result)) {
			$date=date($row['date'], '%d.%m.%y kl. %H:%i');
			echo '<p><br /><b>Skrevet av '.$row->name.' den '.$row->newdate.'</b><br>'.$row->message.'</p>';
			}
			?>

			</td>
			<td width="1px" class="contentborder">&nbsp;</td>
			<td class="bpage_contentfont" valign="top" width="40%"><p><b>Skriv i gjesteboken</b></p>
			<form  name="guest" method="post" action="guestbook.php">
		    	<p><label for="txtName"><b>Navn</b></label><br />
		    	  <input name="txtName" type="text" title="Skriv inn ditt navn" size="30" maxlength="40" />
				</p>
		    	<p><label for="txtMessage"><b>Beskjed</b></label><br />
		    	  <textarea name="txtMessage" cols="25" rows="5" title="Skriv inn din beskjed"></textarea>
				</p>
		    		<p><label title="Legg inn beskjeden">
		    	<input name="submit" type="submit" value="Legg inn" /></label></p>
				</form>
			</td>

Could anyone help me getting some sort of delete function? Someone told me I could delete from myPhpAdmin, how do I do that? And how could I maybe add some sort of LIMIT option, and just display number under the script? Like 1,2,3,…

Thanks alot for any replies!
Fatnslow