Submit a PHP

<form action="" method="post" name="form">
...
<?php
if ($_POST['nieco'] > 'ano' ) {
?>
  <div>
  Nieco
    <input type="checkbox" onclick="this.form.elements['myselect'].style.display = this.checked ? '' : 'none';">
    <select name="myselect" onchange="this.form.submit()" style="display:none">
      <option value="">- žiadna -</option>
      <option value="2">Jedna náprava</option>
      <option value="4">Obidve nápravy</option>
    </select>
  </div>
    <div>
  Nieco2
    <input type="checkbox" onclick="this.form.elements['myselect2'].style.display = this.checked ? '' : 'none';">
    <select name="myselect2" onchange="this.form.submit();" style="display:none">
      <option value="">- žiadna -</option>
      <option value="2">Jedna náprava</option>
      <option value="4">Obidve nápravy</option>
    </select>
  </div>
  </div>
<?php
}
?>
<input type="submit" name="form" value="Odoslať" />

</form>
</p>
<p>
<?php

if($_POST['form'] || $_POST['submit']){
...
vypis

<form action='' method='post' name='form'>
   <div>
   Nieco1
      <input type='checkbox' name='nieco1' onclick="this.form.elements['myselect1'].style.display = this.checked ? '' : 'none';">
<?php if ($_POST[nieco1]){ echo"aktivne";} else { echo"neaktivne";} ?>
      <select name='myselect1' style='display:none'>
         <option value='0'>- žiadna -</option>
         <option value='2'>Jedna náprava</option>
         <option value='4'>Obidve nápravy</option>
      </select>
   </div>
   
    <div>
   Nieco2
      <input type='checkbox' name='nieco2' onclick="this.form.elements['myselect2'].style.display = this.checked ? '' : 'none';">
      <select name='myselect2' style='display:none'>
         <option value='0'>- žiadna -</option>
         <option value='2'>Jedna náprava</option>
         <option value='4'>Obidve nápravy</option>
      </select>
   </div>
<input type='submit' name='submit' value='Odoslať' />
</form>

<?php
if ($_POST[submit])
 {
 $nieco1=$_POST[nieco1];
 $nieco2=$_POST[nieco2];
 $myselect1=$_POST[myselect1];
 $myselect2=$_POST[myselect2];
 
 echo "$nieco1, $nieco2, $myselect1, $myselect2 ";
 }

?>

if($_POST)
{
...
}