codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html dir="ltr" lang="en"><head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>osCommerce</title>


<link rel="stylesheet" type="text/css" href="c_site/stylesheet.css">


<link href="style.css" rel="stylesheet" type="text/css">
<style type="text/css">
<!--
.Stile4 {color: #006699}
-->
</style>
</head>
<body topmargin="0" bottommargin="0" leftmargin="0" rightmargin="0" marginheight="0" marginwidth="0">




  <table width="712" align="center" bgcolor="#ffffff" cellpadding="0" cellspacing="0">
   <tbody><tr><td valign="top" align="center">
    <table width="701" align="center" cellpadding="0" cellspacing="0">
     <tbody><tr><td height="5"></td></tr> 
     <tr><td bgcolor="#d6d6d6" height="5"></td></tr>
     <tr><td height="5"></td></tr>
     <tr><td>
      <table cellpadding="0" cellspacing="0">
       <tbody><tr><td width="300">[img]c_site/m02.gif[/img]</td>
       <td width="1"></td>
       <td class="ch3" width="145">               </td>
       <td width="1" background="c_site/m07.gif"></td>
       <td width="253" valign="top" class="ch3">

         <span class="ch1">Marted&igrave; 25 Marzo 2009</span>

         

         <span class="ch1 Stile4">         Statistiche database</span>

                  Schede catalogate:<span class="ch1"> 1251</span>

         Ultimo aggiornamento: <span class="ch1">11/04/2009</span></td>
       </tr> 
      </tbody></table>
     </td></tr>
     <tr><td height="5"></td></tr>
     <tr><td bgcolor="#d6d6d6" height="5"></td></tr>
     <tr><td height="3"></td></tr>
     <tr><td valign="top">
      <table cellpadding="0" cellspacing="0"> 
       <tbody><tr><td valign="top" width="191">
        <table cellpadding="0" cellspacing="0">
         <tbody><tr><td>[img]c_site/b01.gif[/img]</td></tr>
         <tr><td>[img]c_site/b02.gif[/img]</td>
         </tr>
         <tr><td>[img]c_site/b03.gif[/img]</td></tr>
         <tr><td>[img]c_site/b04.gif[/img]</td></tr>
         <tr><td>[img]c_site/b05.gif[/img]</td>
         </tr>
         <tr><td height="3"></td></tr>
         <tr><td height="27">[img]c_site/m10.gif[/img]</td>
         </tr>
         <tr><td height="3"></td></tr>





<tr>
  <td>  [img]c_site/m11.gif[/img]  Cerca per titolo</td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr><tr>
  <td>  [img]c_site/m11.gif[/img]  Cerca per autore</td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr><tr>
  <td>  [img]c_site/m11.gif[/img]  Cerca per collana</td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr><tr>
  <td>  [img]c_site/m11.gif[/img]  Ricerca libera</td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr><tr><td>  [img]c_site/m11.gif[/img] </td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr><tr><td>  [img]c_site/m11.gif[/img] </td>
</tr><tr><td height="3"></td></tr><tr><td background="c_site/m12.gif" height="1"></td></tr><tr><td height="3"></td></tr>
<tr>
  <td>[img]c_site/m102.gif[/img]</td>
</tr><tr><td height="5"></td></tr>
         
         <tr><td height="2"></td></tr>
       </tbody></table>
        <table width="188" align="left" cellpadding="0" cellspacing="0">
          <tbody>

            <tr>
              <td width="186">Username:</td>
            </tr>
            <tr>
              <td><label>
                <input name="textfield" type="text" id="textfield" size="25">
              </label></td>
            </tr>
            <tr>
              <td>Password:</td>
            </tr>
            <tr>
              <td><label>
                <input name="textfield2" type="password" id="textfield2" size="25">
              </label></td>
            </tr>
            <tr>
              <td></td>
            </tr>
            <tr>
              <td><label>
                <input name="button" type="submit" class="messageBox" id="button" value="Accedi">
              </label></td>
            </tr>
            
            <tr>
              <td align="center"></td>
            </tr>
            <tr>
              <td>[img]c_site/logo.jpg[/img]</td>
            </tr>
          </tbody>
        </table></td>
       <td width="4"></td> 
       <td valign="top" width="505">
        <table cellpadding="0" cellspacing="0">
         <tbody><tr><td height="152">[img]c_site/logo2.png[/img]</td>
         </tr>
         <tr><td height="4"></td></tr>
         <tr><td valign="top">






<table width="100%" border="0" cellpadding="0" cellspacing="0">
  <tbody><tr>

    <td valign="top" width="100%"></td>

  </tr>
</tbody></table>





         </td></tr>
        </tbody></table> 
              <form action="insert.php" method="post" enctype="multipart/form-data" name="form1">
                <table width="427" border="0" cellpadding="0" cellspacing="2">
                  <tr>
                    <td align="right"></td>
                    <td></td>
                  </tr>
                  <tr>
                    <td width="156" align="right">Donazione:</td>
                    <td width="271"><label>
                      <input name="donazione" type="text" id="donazione" size="35" />
                    </label></td>
                  </tr>
                  <tr>
                    <td align="right">Autore:</td>
                    <td><input name="autore" type="text" id="autore" size="35" /></td>
                  </tr>
                  <tr>
                    <td align="right">Titolo:</td>
                    <td><input name="titolo" type="text" id="titolo" size="35" /></td>
                  </tr>
                  <tr>
                    <td align="right">Numero di inventario:</td>
                    <td><label>
                      <input name="inventario" type="text" id="inventario" size="10" />
                    </label></td>
                  </tr>
                  <tr>
                    <td align="right">Collezione:</td>
                    <td><input name="collezione" type="text" id="collezione" size="35" /></td>
                  </tr>
                  <tr>
                    <td align="right">Note:</td>
                    <td><textarea name="note" cols="35" rows="7" wrap="physical" id="note"></textarea></td>
                  </tr>
                  <tr>
                    <td align="right"></td>
                    <td><label>
                      <input type="submit" name="button" id="button" value="Inserisci nel database" />
                      </label>
                        <label>
                        <input type="reset" name="button2" id="button2" value="cancella" />
                      </label></td>
                  </tr>
                </table>
                            </form>
              </td>
       </tr>
      </tbody></table>
     </td></tr>
     <tr><td height="6"></td></tr>
     <tr><td bgcolor="#d0d0d0" height="5"></td></tr>
     <tr><td height="12"></td></tr>
     <tr><td>
      <table cellpadding="0" cellspacing="0">
       <tbody><tr><td width="350"></td>
       <td class="ch8" width="351" align="right">Copyright © 2009 Biblioteca Pio XI. Powered by YouSTORE Informatica</td>
       </tr>
      </tbody></table> 
     </td></tr>
    </tbody></table>
   </td></tr>
   <tr><td height="15"></td></tr>
  </tbody></table>

</body></html>
questa è la pagina insert.php
Codice PHP:
<?
// Connessione al db
$link = mysql_connect('localhost', '', '')
or die('Connessione al db fallita.');
// selezione del db
mysql_select_db("prova", $link);



$sql="INSERT INTO dati (donazione,  autore, titolo,  inventario, collezione,note)
VALUES
('$_POST[donazione]','$_POST[autore]','$_POST[titolo]','$_POST[inventario]','$_POST[note]','$_POST[note]')";

if (!mysql_query($sql,$link))
  {
  die('Errore: ' . mysql_error());
  }
echo "L'articolo aggiunto al catalogo! ";



mysql_close($link)
?>
perchè mi restituisce pagina bianca???