mi date un'occhiata a questo piccolo codice?
codice:
<script type="text/javascript">
function textCounter(field,cntfield,maxlimit) {
if (field.value.length > maxlimit) // if too long...trim it!
field.value = field.value.substring(0, maxlimit);
// otherwise, update 'characters left' counter
else
cntfield.value = maxlimit - field.value.length;
}
//  End -->
</script>
<form action="<%=MM_editAction%>" method="post" id="form1" >
  <div class="evid">Commento : <span class="evid2">(max 2500 caratteri)</span></div>
                  

Caratteri disponibili</p>
				  

<input type="text" name="remLen2" size="3" maxlength="3" value="125" /></p>
				  

<textarea name="Commento" cols="45" rows="15"  onkeydown="textCounter(document.form1.Commento,document.form1.remLen2,125)"
onkeyup="textCounter(document.form1.Commento,document.form1.remLen2,125)"></textarea>
                  </p>
                  

<input type="submit" value="Inserisci record" /></p>
                  <div><input type="hidden" name="idNews" value="<%=Request.QueryString("ID")%>" /></div>
                  <div><input type="hidden" name="Ip" value="<%=Request.ServerVariables("REMOTE_ADDR")%>" /></div>
                  <div><input type="hidden" name="Utente" value="<%= Session("kt_login_user") %>" /></div>
                  <div><input type="hidden" name="MM_insert" value="form1" /></div>
                </form>
mi da errore su field non definito.