I would like the fields not to be sent in white, so I tried using the required .. but it is not working. What is the reason?
<form action="https:/----Site---" method="POST">
<input type=hidden name="oid" value="00Dj0000001qrSu">
<input type=hidden name="retURL" value="http://-----/?msg=ok">
<input type=hidden name="lead_source" value="Formulário Site">
<table>
<tr>
<td>
<input type="text" name="first_name" placeholder="Nome:" maxlength="250" required="required" />
</td>
<td>
<input type="text" name="email" placeholder="E-mail:" maxlength="250" required="required" />
</td>
</tr>
<tr>
<td>
<input type="text" name="company" placeholder="Empresa:" maxlength="250" required="required" />
</td>
<td>
<input type="text" name="phone" placeholder="Telefone:" maxlength="250" required="required" />
</td>
</tr>
<tr>
<td colspan="2">
<textarea name="description" placeholder="Mensagem/Comentários:" rows="4" required="required"></textarea>
</td>
</tr>
<tr>
<td colspan="2">
<input type="submit" name="enviar" value="Enviar" />
</td>
</tr>
</table>
</form>