Si, hai ragione, chiedo se per piacere mi possono spostare il post nella sezione correta JS...
pensavo fosse più un problema di php...

ecco il mio form
Codice PHP:
<form name="form1" id="form1" method="post" action="data_insert_vero.php" onClick="validate()" >


<table width="400" border="0">
 <tr>
   <td width="86"><div class="formtext"> Nome </div></td> 

     <td ><input type="text" name="name" tabindex="1" id="name" required="true" validate="name" message="namemsg" /></td>
    
    <td width="130"  class="rules" id ="namemsg">*</td>
</tr>

<tr>
   <td width="86"><div class="formtext"> Cognome </div></td> 

     <td><input type="text" name="lastname" tabindex="1" id="lastname" required="true" validate="lastname" message="lastnamemsg" /></td>
    
    <td width="25"  class="rules" id ="lastnamemsg">*</td>
</tr>

<tr>
   <td width="86"><div class="formtext"> Matricola </div></td> 

     <td><input type="text" name="matricola" tabindex="1" id="matricola" required="true"  message="matricolamsg" /></td>
    
    <td width="25"  class="rules" id ="matricolamsg">*</td>
</tr>

<tr>
   <td width="86"><div class="formtext"> Email </div> </td>
   <td><input type="text" name="emailaddress" tabindex="2" id="emailaddress" required ="true" validate="email"message="emailaddressmsg"/></td>
   
   
   <td id="emailaddressmsg" width="25" class="rules">*</td>

 </tr>
 
 <tr>
   <td width="86"><div class="formtext"> Password </div> </td> 

     <td><input type="password" name="password" tabindex="1" id="password" required="true" validate="password" message="passwordmsg" /></td>
    
    <td width="25"  class="rules" id ="passwordmsg">*</td>
</tr>

 
    
<tr>
   <td width="86"><div class="formtext"> Indirizzo </div></td> 

     <td><input type="text" name="indirizzo" tabindex="1" id="indirizzo" required="false" message="indirizzomsg" /></td>
    
</tr>

<tr>
   <td width="86"><div class="formtext"> Citt&aacute; </div></td> 

     <td><input type="text" name="citta" tabindex="1" id="citta" required="false" message="cittamsg" /></td>
    
</tr>

<tr>
   <td width="86"><div class="formtext"> Cap </div> </td>

   <td><input type="text" name="zipcode" tabindex="2" id="zipcode" validate="zip" message="zipcodemsg"/></td>
       <td width="25"  class="rules" id ="zipcodemsg"></td>
 </tr>
 
 

<tr>
   <td width="86"><div class="formtext"> Telefono </div></td> 

     <td><input type="text" name="tel" tabindex="1" id="tel" required="false" validate="numeric" message="telmsg" /></td>
    <td width="25"  class="rules" id ="telmsg"></td>
</tr>

</table>






<table width="400" border="0">
<tr>
<td width="87"> </td>
<div class="inputsubmit"></div>

 <td><p align="left"><input type="button" name="Submit" value="Registrazione" tabindex="9" /></p>
   </td>
</tr>  
  
</table>

</form>