alert con php

[pindol]

:master: :master: :master: :master:

dove sbaglio?

<?php
  function verifica(){     
   for($i=0; $i<5; $i++){     
    $rnd = rand(1,9);
         $codice[$i] = $rnd;
         echo $codice[$i];
         $stringa .=$codice[$i];
     }
 }
  verifica();  ?>  <table style="width: 520px;" border="0" cellspacing="0" cellpadding="5">  <form action="lol.php" method="post" >
 <tbody>
 <tr>
 <td width="auto">
    <label>Codice</label>
  </td>
  <td>
    <input maxlength="100" name="codice" />
  </td>
 </tr>
 <tr>     
   <td><input name="invia" type="submit" value="Submit"/>
   </td> 
 </tr> 
</tbody> 
</form> </table>  

<?php
  echo '<script>     if (form.codice.value != '.$stringa.' ) {
          alert("Codice errato");
     }';      
?>