Combobox

[antoedp]

Ciao a tutto il forum !
Questo è il mio problema ho 5 combo box (name="dec_1" "dec_2" "dec_3" "dec_4" "dec_5")
Perchè con questo script non "controlla" nulla ???
<script>
function formControl(ff)
{
if (ff.dec_1.value==0) && (ff.dec_2.value==0) && (ff.dec_3.value==0) && (ff.dec_4.value==0) && (ff.dec_5.value==0)
{
alert('Errore')
return false
}
}
</script>

<form method="get" action="vota_pers.asp" style="margin:0" onSubmit="return formControl(this);">

<select name="dec_1" class="txt">
<option value="0" selected>Seleziona</option>
<option value="1">1 - Scarso</option>
<option value="2">2 - Mediocre</option>
<option value="3">3 - Sufficiente</option>
<option value="4">4 - Buono</option>
<option value="5">5 - Ottimo</option>
</select>
</td>
<td align="center">
<select name="dec_2" class="txt">
<option value="0">Seleziona</option>
<option value="1">1 - Scarso</option>
<option value="2">2 - Mediocre</option>
<option value="3">3 - Sufficiente</option>
<option value="4">4 - Buono</option>
<option value="5">5 - Ottimo</option>
</select>
</td></td>
<td align="center">
<select name="dec_3" class="txt">
<option value="0">Seleziona</option>
<option value="1">1 - Scarso</option>
<option value="2">2 - Mediocre</option>
<option value="3">3 - Sufficiente</option>
<option value="4">4 - Buono</option>
<option value="5">5 - Ottimo</option>
</select>
</td></td>
<td align="center">
<select name="dec_4" class="txt">
<option value="0">Seleziona</option>
<option value="1">1 - Scarso</option>
<option value="2">2 - Mediocre</option>
<option value="3">3 - Sufficiente</option>
<option value="4">4 - Buono</option>
<option value="5">5 - Ottimo</option>
</select>
</td></td>
<td align="center">
<select name="dec_5" class="txt">
<option value="0">Seleziona</option>
<option value="1">1 - Scarso</option>
<option value="2">2 - Mediocre</option>
<option value="3">3 - Sufficiente</option>
<option value="4">4 - Buono</option>
<option value="5">5 - Ottimo</option>
</select>
<input type="submit" name="Submit" value=" Vota " class="button">

[cavicchiandrea]

cambia cosi la function

<script>
function formControl(ff)
{
if (ff.dec_1.options[ff.dec_1.selectedIndex].value==0) && (ff.dec_2.options[ff.dec_2.selectedIndex].value==0) && (ff.dec_3.options[ff.dec_3.selectedIndex].value==0) && (ff.dec_4.options[ff.dec_4.selectedIndex].value==0) && (ff.dec_5.options[ff.dec_5.selectedIndex].value==0)
{
alert('Errore')
return false
}
}
</script>