Aggiungo informazioni magari mi sapete aiutare praticamente c'è la parte di registrazione così


<form name="login" method="post" action="<?=$urlsito;?>/add_user.php?action=add_user_do" enctype="multipart/form-data">
<table width="100%" border="0">
<tr>
<td width="15%"><span class="Stile5">Username:</span> </td>
<td width="20%"><input name="user" type="text" class="Stile3" size="20"> </td>
<td></td>
</tr>
<tr>
<td><span class="Stile5">Password</span>:</td>
<td ><input name="pass" type="password" class="Stile3" size="20"></td>
<td></td>
</tr>
<tr>
<td class="Stile5">Controllo Password: </td>
<td ><input name="pass2" type="password" class="Stile3" size="20"></td>
<td></td>
</tr>
<tr>
<td class="Stile5">E-Mail</td>
<td><input name="mail" type="text" class="Stile3" size="20"></td>
<td></td>
</tr>
<tr>
<td class="Stile5">Nome </td>
<td><input name="name" type="text" class="Stile3" size="20"></td>
<td></td>
</tr>
<tr>
<td><span class="Stile5">Cognome </span></td>
<td><input name="surname" type="text" class="Stile3" size="20"></td>
<td></td>
</tr>
<tr>
<td><span class="Stile5">Subnick</span></td>
<td><input name="subnick" type="text" class="Stile3" size="20" value=""></td>
<td></td>
</tr>
<tr>
<td>

Paypal</p>
</td>
<td><input name="paypal" type="text" class="Stile3" size="20" value="" /></td>
<td></td>
</tr>
<tr>
<td width="15%">
<div align="left">


<input name="submit" type="submit" class="Stile5" value="Registra">
</p>
</div></td>
<td width="20%"><div align="left"></div></td>
<td></td>
</tr>
</table>
</form>

e io vorrei che quella che si chiama subnick venga inserita tramite url aiutatemi vi prego non sò più che fare... grazie