It turns out that I'm working on a form where I have to save a user and an input, I need the information sent to "list" to save it, but it's a 2-step form, from the user register to the input record sale and then to list, then from the user record I need the information to be sent to list but continue on the page I need to register the input, I do not know if I explain.
<form action="ingresar_venta.php" method="post" id="form" name="form" onsubmit="return validar();">
<table align="center" style="font-size: 20px;">
<tr>
<td>Rut</td>
<td><input type="text" name="txt_rut" id="rut" required=""></td>
</tr>
<tr>
<td>Nombre</td>
<td><input type="text" name="txt_nombre" id="nombre" required=""></td>
</tr>
<tr>
<td>Apellido</td>
<td><input type="text" name="txt_appelido" id="apellido" required=""></td>
</tr>
<tr>
<td>Telefono</td>
<td><input type="text" name="txt_telefono" id="telefono" required=""></td>
</tr>
<tr>
<td>Direccion</td>
<td><input type="text" name="txt_direccion" id="direccion" required=""></td>
</tr>
<tr>
<td>Region</td>
<td>
<select name="txt_region" id="region" required="">
<option value="I">I-de Tarapacá</option>
<option value="II">II-de Antofagasta</option>
<option value="III">III-de Atacama</option>
<option value="IV">IV-de Coquimbo</option>
<option value="V">V-de Valparaíso</option>
<option value="VI">VI-del Libertador General Bernardo O'Higgins</option>
<option value="VII">VII-del Maule</option>
<option value="VIII">VIII-del Bio Bio</option>
<option value="IX">IX-de la Araucanía</option>
<option value="X">X-de los Lagos</option>
<option value="XI">XI-Aisén del General Carlos Ibáñez del Campo</option>
<option value="XII">XII-de Magallanes y Antártica Chilena</option>
<option value="XIV">XIV-de los Ríos</option>
<option value="XV">XV-de Arica y Parinacota</option>
<option value="RM">RM-Region Metropolitana</option>
</select>
</td>
</tr>
<tr>
<td>Comuna</td>
<td>
<select name="txt_comuna" id="comuna" required=""></select>
</td>
</tr>
<tr>
<td>Correo</td>
<td><input type="text" name="txt_correo" id="correo" required=""></td>
</tr>
<tr>
<td><input class="submit" type="submit" value="Siguiente">
<input type="submit" value="Cancelar" onclick="location.href='../index.html';"></td>
</tr>
</table>
</form>