Originariamente inviato da var
potresti postare tutto il contenuto della pagina (così facciamo un pò di debug...)?
Ok...ecco qui...

<SCRIPT LANGUAGE="JavaScript">


function formaHandler(form){
var URL = "inserimento.php?macchina=";
//alert ("Ecco = "+this.document.forms[0].macchina.selectedIndex)
URL = URL + (document.inserisci.macchina.selectedIndex);
URL = URL + "&utente=";
URL = URL + (document.inserisci.utente.value);
URL = URL + "&matricola=";
URL = URL + (document.inserisci.matricola.value);
URL = URL + "&data=";
URL = URL + (document.inserisci.data.value);
URL = URL + "&lotto=";
URL = URL + (document.inserisci.lotto.value);
URL = URL + "&ore=";
URL = URL + (document.inserisci.ore.value);
URL = URL + "&minuti=";
URL = URL + (document.inserisci.minuti.value);
URL = URL + "&codice_prod=";
URL = URL + (document.inserisci.codice_prod.value);
URL = URL + "&desc_prod=";
URL = URL + (document.inserisci.desc_prod.value);
// controllare c'è qcosa che non va !
//URL = URL + "&qtabuona=";
//URL = URL + (document.inserisci.qtabuona.value);
//URL = URL + "&qtascarto=";
//URL = URL + (document.inserisci.qtascarto.value);
//URL = URL + "&qtaprodotta=";
//URL = URL + (document.inserisci.prodotta.value);
URL = URL + "&operazione=";
URL = URL + (document.inserisci.operazione.selectedIndex);
window.location.href = URL;
}
</SCRIPT>

</HEAD>


<BODY bgColor=#ffffff background="/images/bkgd.gif" scroll=auto>

<FORM method="post" enctype="multipart/form-data" action="inser_scheda.php?login=<? echo $login;?>" name="inserisci">


<TABLE width=100% border=1>
<TR>
<TD width=5% rowspan=1>[img]/images/spacer.gif[/img]</TD>

<TD align="center" >




<TABLE width=100% border=1>
<TR><TD width=33% align="center">
<TABLE border=0 bgcolor="#C4DDF2" cellspacing=2>
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>
Utente
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD><INPUT tabindex=5 size=25 maxlength=100 name="utente" value=<? print "$login"; ?>>
</TD>
</TR>
</TABLE>
</TD>
<TD width=33% align="center">
<TABLE border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>
Matricola
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD><INPUT tabindex=5 size=25 maxlength=100 name="matricola" value=<? print "$matricola"; ?>>
</TD>
</TR>
</TABLE>
</TD>
<TD width=33% align="center">
<TABLE width=50% border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>
Data
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT tabindex=5 size=10 maxlength=10 name="data" value=<? print "$data"; ?>>
</TD>
</TR>
</TABLE>
</TD>
</TD></TR>
</TABLE>




<TABLE width=100% border=1>
<TR><TD width=50% align="center">
<TABLE border=0 bgcolor="#C4DDF2" cellspacing=2>
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>
Lotto
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT tabindex=5 size=30 maxlength=100 name="lotto" value=<? print "$lotto"; ?>>
</TD>
</TR>
</TABLE>
</TD>
<TD width=50% align="center">
<TABLE border=0 bgcolor="#C4DDF2" cellspacing=2>
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Ore Lavorate [hh:mm]
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT tabindex=5 size=4 maxlength=4 name="ore" value=<? print "$ore"; ?>>:<INPUT tabindex=5 size=2 maxlength=3 name="minuti" value=<? print "$minuti"; ?>>
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>




<TABLE width=100% border=1>
<TR><TD width=10% align="center">
<TABLE border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD colspan=2 align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>
Codice Prodotto
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD><INPUT size=9 maxlength=9 name="codice_prod" readonly=yes value=<? echo $codice_prod ?> >
</TD>
<TD><input tabindex=3 type = "button" value ="Cerca" onClick="apri_popup()" >
</TD>
</TR>
</TABLE>
</TD>
<TD width=25% align="center">
<TABLE width=50% border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD colspan=2 align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Descrizione Prodotto
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD>
<INPUT size=70 maxlength=60 name="desc_prod" readonly=yes value=<? echo $desc_prod ?> >
</TD>
<TD><input tabindex=4 type = "button" value ="Cerca" onClick="apri_popup()" >
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>




<TABLE width=100% border=0>
<TR><TD><FIELDSET>
<LEGEND><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Quantità</FONT></LEGEND>

<TABLE width=100% border=0>
<TR><TD width=33% align="center">
<TABLE width=50% border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Q.tà Buona
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT size=6 maxlength=6 name="qtabuona " value=<? echo $qtabuona ?> >
</TD>
</TR>
</TABLE>
</TD>
<TD>( + )
</TD>
<TD width=33% align="center">
<TABLE width=50% border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Q.tà Scarto
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT size=6 maxlength=6 name="qtascarto" value=<? echo $qtascarto ?>>
</TD>
</TR>
</TABLE>
</TD>
<TD>( = )
</TD>
<TD width=33% align="center">
<TABLE width=50% border=0 bgcolor="#C4DDF2">
<TR bgcolor="#E5E9F7"><TD align="center" nowrap><FONT face=Arial, Helvetica, sans-serif color="#336699" size=2>Q.tà Prodotta
</FONT></TD>
</TR>
<TR bgcolor="#FFFFFF"><TD align="center"><INPUT size=6 maxlength=6 name="qtaprodotta" value=<? echo $qtaprodotta ?> >
</TD>
</TR>
</TABLE>
</TD>
</TR>
</TABLE>


</FIELDSET>
</TR>
</TABLE>



</FORM>

</TD></TR></TABLE>

</BODY>
</HTML>