Si bene
funziona
codice:
<form name="test" action="tedt" method="post">
<select name="prima" onChange="controlla(this.value)">
<option name="zero" value="">zero</option>
<option name="uno" value="1">uno</option>
<option name="due" value="2">due</option>
<option name="tre" value="3">tre</option>
</select>
<input type="text" name="aaa" id="altrocampo" style="display:none">
<input type="submit" name="submit" value="send" />
</form>
<script language="JavaScript" type="text/javascript"
xml:space="preserve">//<![CDATA[
var frmvalidator = new Validator("test");
frmvalidator.addValidation("prima","req","Selezionare");
function controlla(valuta) {
if(valuta <= 1) {
document.getElementById('altrocampo').style.display='none';
}else{
document.getElementById('altrocampo').style.display='';
frmvalidator.addValidation("aaa","req","compila anche il campo aaa");
}
}
//]]></script>