azz... non chiedere troppo...


<script>
function dennis(){
o=document.form1.prima
was=o[o.selectedIndex].value
if(was=="no")stato=true
else stato=false
document.form1.seconda.disabled=stato
}
</script>
<body onLoad="dennis()">
<form name="form1">
<select name="prima" onChange="dennis()">
<option value="no">NN valida</option>
<option value="uno">1</option>
<option value="due">2</option>
</select>
<select name="seconda">
<option value="uno">1</option>
<option value="tre">3</option>
<option value="due">2</option>
</select>


ti piace?