php - Javascript location.href doesnt redirect

My problem is, that thelocation.href doesn't redirect me to the page that i want. What it does, that the page just reloads.

I tried with button, and withoutpreventdefault(), but still the same problems.

<script type="text/javascript">
  $(document).ready(function(e) 
  {
    $('#submitButton').click(function(e)
    {
      e.preventDefault();
      var iro = $('#iro').val();
      var date_start = $('#date_start').val();
      var date_end = $('#date_end').val();
      location.href = "https://site.hu/cms/uj-kifizetes.php?iro="+iro+"&date_start="+date_start+"&date_end="+date_end+"&lekerdezes=1";
    });
  });
</script>

<select name="iro" id="iro" >
  <?php
  $ertek = isset($_POST["iro"]) ? $_POST["iro"] : '' ;
  $get_irok = mysqli_query($kapcs, "SELECT iro_id, iro_nev FROM iro WHERE iro_status = 1 ORDER BY iro_nev ASC");
  if(mysqli_num_rows($get_irok) > 0 )
  {
    while($irok = mysqli_fetch_assoc($get_irok))
    {
      $selected = $ertek == $irok['iro_id'] ? ' selected      echo '<option ' . $selected . ' value="'.$irok['iro_id'].'">'.$irok['iro_nev'].'</option>';
    }
  } 
  ?>
</select>

<td >
<input autocomplete="off" type="text" name="date_start" id="date_start" required value="<?php if(isset($_POST['date_start'])) { echo $_POST['date_start'];} ?>" />
</td>
<td >
<input autocomplete="off" type="text" name="date_end" id="date_end" required value="<?php if(isset($_POST['date_end'])) { echo $_POST['date_end'];} ?>" />
</td>
<td ><button name="submitButton" id="submitButton" type="submit">Lekérdezés</button></td>
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