Prueba este:
Código PHP:
<?php
$sql = "Select * from $bd_tabla Where id = '".$_GET["id"]."'";
$result = mysql_query($sql) or die (mysql_error());
while($row = mysql_fetch_array($result)){
echo "<center> Name: <b>".$row["Name"]."</b><br><br>\n";
echo "Telephone: <b>".$row["Telephone"]."</b><br><br>\n";
echo "Date: <b>".$row["Date"]."</b><br><br>\n";
?>
<form action="pagina1.php?id=<?php echo $_GET["id"] ?>" method="post"><br>
<input type="hidden" name="ids" value="<?php echo $row["id"]?>">
<input type="submit" class="boton" value="Delete" name="delete">
</form></p>
<?
if(isset($_POST['delete'])) {
$query="Update $bd_tabla Set Name= NULL, Date= NULL, Time=NULL, Datereturned=NULL, Availability='Available' Where id='".$_POST['ids']."'";
$resultado=mysql_query($query) or die (mysql_error());
}
?>
Dime si el id es numerico?? en autoincrement??
Saludos,