in pratica ad ogni pressione del tasto salva vado a richiamare (dopo aver fatto tutti i controlli della funzione javascript) un'altra pagina dove vado a salvare i vari valori nel db e poi gli faccio un redirect a questa pagina per completare le altre form ora chiedevo c'e' modo di disabilitare il pulsante per far si che l'utente nn riprema salva e vada cosi' ad inserire doppio valore???

ecco il codice html del form

<form name="alunno1" action="sqlr.php">
<td>
Di Daniele </td>
<td>
<input name="ora1" type="checkbox" checked>
<input type="hidden" name="mat1" value="">
<input type="hidden" name="larsa1" value="">
<input type="hidden" name="doc1" value="">
<input type="hidden" name="cod1" value="">
<input type="hidden" name="coo1" value="">
<input type="hidden" name="tut1" value="">
</td>
<td>
<input name="ora2" type="checkbox" checked>
<input type="hidden" name="mat2" value="">
<input type="hidden" name="larsa2" value="">
<input type="hidden" name="doc2" value="">
<input type="hidden" name="cod2" value="">
<input type="hidden" name="coo2" value="">
<input type="hidden" name="tut2" value="">
</td>
<td>
<input name="ora3" type="checkbox" checked>
<input type="hidden" name="mat3" value="">
<input type="hidden" name="larsa3" value="">
<input type="hidden" name="doc3" value="">
<input type="hidden" name="cod3" value="">
<input type="hidden" name="coo3" value="">
<input type="hidden" name="tut3" value="">
</td>
<td>
<input name="ora4" type="checkbox" checked>
<input type="hidden" name="mat4" value="">
<input type="hidden" name="larsa4" value="">
<input type="hidden" name="doc4" value="">
<input type="hidden" name="cod4" value="">
<input type="hidden" name="coo4" value="">
<input type="hidden" name="tut4" value="">
</td>
<td>
<input name="ora5" type="checkbox" checked>
<input type="hidden" name="mat5" value="">
<input type="hidden" name="larsa5" value="">
<input type="hidden" name="doc5" value="">
<input type="hidden" name="cod5" value="">
<input type="hidden" name="coo5" value="">
<input type="hidden" name="tut5" value="">
</td>
<td>
<input name="ora6" type="checkbox" checked>
<input type="hidden" name="mat6" value="">
<input type="hidden" name="larsa6" value="">
<input type="hidden" name="doc6" value="">
<input type="hidden" name="cod6" value="">
<input type="hidden" name="coo6" value="">
<input type="hidden" name="tut6" value="">
</td>
<td>
<input name="ora7" type="checkbox" checked>
<input type="hidden" name="mat7" value="">
<input type="hidden" name="larsa7" value="">
<input type="hidden" name="doc7" value="">
<input type="hidden" name="cod7" value="">
<input type="hidden" name="coo7" value="">
<input type="hidden" name="tut7" value="">
</td>
<td>
<input name="ora8" type="checkbox" checked>
<input type="hidden" name="mat8" value="">
<input type="hidden" name="larsa8" value="">
<input type="hidden" name="doc8" value="">
<input type="hidden" name="cod8" value="">
<input type="hidden" name="coo8" value="">
<input type="hidden" name="tut8" value="">
</td>
<td>
<input type="button" name='Salva' value='Salva' onClick="javascript:invia(form.name)">

unica cosa che volevo sapere e' come faccio a disabilitare TUTTI gli elementi di un form?