In caso di necessità integriamo la potente ricerca:

codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Help Desk Virtuale</title>
<link rel="stylesheet" href="stylesheet.css">
<script language="JavaScript" type="text/JavaScript">
<!--
function checkData(calllog)
{
    
      if (calllog.Categoria.value.length <= 0)
    {
      alert("Categoria non selezionata.");
      calllog.Categoria.focus();
 
      // Invio del FORM abortito
      return(false);
    }

       if (calllog.Categoria.value =="Altra" && calllog.Categoria2.value.length == "")
    {
      alert("Categoria  non selezionata.");
      calllog.Categoria.focus();
  
      // Invio del FORM abortito
      return(false);
    }
  
      // Abilita l'invio del FORM
  return(true);
}
 
//-->
</script>
</head>
 
<body>
 
        <form name="calllog" method="post" action="send.asp" onSubmit="return checkData(this)">
 

 
                <select name="Categoria" id="CLProblemaCat" class="formx" onchange="if(this.options[9].selected) this.form.Categoria2.disabled = false; else this.form.Categoria2.disabled = true;">
                  <option>-- Selezionare la categoria del problema --</option>
                  <option value="Account">Account</option>
                  <option value="Email">Email</option>
                  <option value="Forum">Forum</option>
                  <option value="Guestbook">Guestbook</option>
                  <option value="Newsletter">Newsletter</option>
                  <option value="SPAM">SPAM</option>
                  <option value="Registrazione">Registrazione</option>
                  <option value="Website">Website</option>
                  <option value="Altra">Altra categoria</option>
                </select>
 
                <input name="Categoria2" disabled type="text" id="CLProblemaAltro" size="31" maxlength="100" class="formx" value="">
 


<input type="submit" value="Invia" name="B1"></p>
</form>
</body>
</html>