JQuery fires upon submitting form - php

Question

I'm currently creating a page where you can fill in damage claims about damaged cars/goods. You have 3 options (driver/subcontractor/personel) and JQuery is used to show/hide different textboxes according to the selected option.
Here's where it gets tricky. Everything works great until I submit the form. When I do it fires the changeVehicle JQuery-function again and reloads the original value in licensePlate again, even after I altered it in the form. The result being that I get the old variable for my license plate.
Does anyone have an idea why it refires?
My code:
<?php
...
<form id="form" class="form-horizontal" method="post" action="<?php echo $url?>&action=edit<?php echo $edit?>" enctype="multipart/form-data">
<div class="control-group">
<label class="control-label" for="filenr"><?php echo $lng->show("claim_file_nr")?></label>
<div class="controls">
<input type="text" id="filenr" name="filenr" value="<?php echo $file_nr?>" disabled>
<input type="hidden" id="file_nr" name="file_nr" value="<?php echo $file_nr?>" />
</div>
</div>
<div class="control-group">
<label class="control-label" for="damage_type"><?php echo $lng->show("claim_damage_type")?>*</label>
<div class="controls">
<select id="damage_type" name="damage_type" <?php if ($par["id"] != 0) { echo "disabled"; } ?>>
<option value="0" <?php if ($damage_type == 0) echo "selected" ?>><?php echo $lng->show("claim_type_vehicle") ?></option>"
<option value="1" <?php if ($damage_type == 1) echo "selected" ?>><?php echo $lng->show("claim_type_goods") ?></option>"
</select>
</div>
</div>
<div class="control-group">
<label class="control-label" for="date_damage"><?php echo $lng->show("claim_date_damage"); ?>*</label>
<div class="controls">
<div class="input-append">
<input class="input-small" type="text" id="date_damage" name="date_damage" data-date-format="dd-mm-yyyy" placeholder="dd-mm-yyyy"
value="<?php echo $cfunc->convertDateFromDB(substr($date_damage, 0, 10)) ?>" required>
<span class="add-on"><i class="icon-calendar"></i></span>
</div>
</div>
</div>
<div class="control-group">
<label class="control-label" for="description"><?php echo $lng->show("claim_description")?>*</label>
<div class="controls">
<textarea class="input-xxlarge" rows="4" id="description" name="description" required><?php echo $description;?></textarea>
</div>
</div>
<div class="control-group">
<label class="control-label" for="choice"><?php echo $lng->show("claim_choice")?>*</label>
<div class="controls controls-row">
<select id="choice" name="choice" onchange="changeChoice();">
<option value="1" <?php if (isset($driver)&& $driver != 0) echo "selected" ?>><?php echo $lng->show("claim_driver") ?></option>"
<option value="2" <?php if (isset($subcontractor)&& $subcontractor != 0) echo "selected" ?>><?php echo $lng->show("claim_subcontractor") ?></option>"
<option value="3" <?php if ($personel != "") echo "selected" ?>><?php echo $lng->show("claim_personel") ?></option>"
</select>
</div>
</div>
<div id="driver-container" class="control-group">
<label class="control-label" for="driver"><?php echo $lng->show("claim_driver")?>*</label>
<div class="controls controls-row">
<select id="driver" name="driver">
<?php
$result = $db->q("SELECT * FROM ERP_drivers");
foreach ($result as $a) {
if ($driver == $a["driver_id"]) {
echo "<option value=".$a["driver_id"]." selected>".$a["driver_name"]."</option>";
}else{
echo "<option value=".$a["driver_id"].">".$a["driver_name"]."</option>";
}
}
?>
</select>
</div>
</div>
<div id="subcontractor-container" class="control-group">
<label class="control-label" for="subcontractor"><?php echo $lng->show("claim_subcontractor")?>*</label>
<div class="controls controls-row">
<select id="subcontractor" name="subcontractor">
<?php
$subcontractors = $db->q("SELECT r.relatie_id, r.relatie_naam
FROM relaties AS r INNER JOIN relatie_lijsten AS l
ON r.relatie_id = l.relatie_lijst_relatie_id
WHERE l.relatie_lijst_relatieslijst_id = 23");
foreach($subcontractors as $s){
if ($subcontractor == $s["relatie_id"]) {
echo "<option value=\"".$s["relatie_id"]."\" selected>".$s["relatie_naam"]."</option>";
}else{
echo "<option value=\"".$s["relatie_id"]."\">".$s["relatie_naam"]."</option>";
}
}
?>
</select>
</div>
</div>
<div id="personel-container" class="control-group">
<label class="control-label" for="personel"><?php echo $lng->show("claim_personel")?>*</label>
<div class="controls controls-row">
<select id="personel" name="personel">
<?php
$personelList = $db->q("SELECT * FROM `erp_gebruiker` WHERE `actief` =1");
foreach($personelList as $p){
if ($personel == $p["gebruiker_id"]) {
echo "<option value=\"".$p["gebruiker_id"]."\" selected>".$p["naam"]."</option>";
}else{
echo "<option value=\"".$p["gebruiker_id"]."\">".$p["naam"]."</option>";
}
}
?>
</select>
</div>
</div>
<div id="vehicle-container" class="control-group">
<label class="control-label" for="vehicle"><?php echo $lng->show("claim_choice_vehicle")?>*</label>
<div class="controls controls-row">
<select id="vehicle" name="vehicle" onchange="changeVehicle();">
<?php
$result = $db->q("SELECT * FROM ERP_vehicles");
foreach ($result as $v) {
if ($vehicle == $v["vehicle_id"]) {
echo "<option value=".$v["vehicle_id"]." selected>".$v["vehicle_name"]."</option>";
}else{
echo "<option value=".$v["vehicle_id"].">".$v["vehicle_name"]."</option>";
}
}
?>
</select>
</div>
</div>
<div class="control-group">
<label class="control-label" for="license_plate"><?php echo $lng->show("claim_license_plate")?></label>
<div class="controls">
<input type="text" id="license_plate" name="license_plate" value="<?php echo $license_plate; ?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="faulty"><?php echo $lng->show("claim_faulty")?></label>
<div class="controls controls-row">
<select id="faulty" name="faulty">
<option value="0" <?php if ($faulty == 0) echo "selected"; ?>><?php echo $clng->show("no")?></option>";
<option value="1" <?php if ($faulty == 1) echo "selected"; ?>><?php echo $clng->show("yes")?></option>";
</select>
</div>
</div>
<div class="control-group">
<label class="control-label" for="file_insurance"><?php echo $lng->show("claim_insurance_nr")?></label>
<div class="controls">
<input type="text" id="file_insurance" name="file_insurance" value="<?php echo $file_insurance?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="damage_amount"><?php echo $lng->show("claim_damage_amount")?></label>
<div class="controls">
<input type="number" step="0.01" id="damage_amount" name="damage_amount" value="<?php echo $damage_amount?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="exemption"><?php echo $lng->show("claim_exemption")?></label>
<div class="controls">
<input type="number" step="0.01" id="exemption" name="exemption" value="<?php echo $exemption?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="amount_payed"><?php echo $lng->show("claim_amount_payed")?></label>
<div class="controls">
<input type="number" step="0.01" id="amount_payed" name="amount_payed" value="<?php echo $amount_payed?>">
</div>
</div>
<div class="control-group">
<label class="control-label" for="status"><?php echo $lng->show("claim_status")?></label>
<div id="choice" class="controls">
<select id="status" name="status">
<option value="1" <?php if ($status == 1) echo "selected"; ?>><?php echo $lng->show("claim_status_handling")?></option>";
<option value="2" <?php if ($status == 2) echo "selected"; ?>><?php echo $lng->show("claim_status_handled")?></option>";
</select>
</div>
</div>
<div class="form-actions">
<button type="submit" class="btn btn-primary"><?php echo $knop?></button>
<button type="button" class="btn" onclick="javascript:location.href='<?php echo $url?>'"><?php echo $clng->show("cancel")?></button>
</div>
</form>
<script>
$(function () {
$("input,select,textarea").not("[type=submit]").jqBootstrapValidation();
changeChoice();
// alert("blablabla");
});
$("#date_damage").datepicker({format:'dd-mm-yyyy'});
function changeChoice() {
var c = $("#choice :selected").val();
if (c == "1") {
$("#driver-container").show();
$("#subcontractor-container").hide();
$("#personel-container").hide();
} else if (c == "2") {
$("#driver-container").hide();
$("#subcontractor-container").show();
$("#personel-container").hide();
} else {
$("#driver-container").hide();
$("#subcontractor-container").hide();
$("#personel-container").show();
}
changeVehicle()
}
function changeVehicle() {
var choice = $("#choice :selected").val();
var vehiclePlate = $("#vehicle :selected").val();
var licensePlate = '<?php if ($par["id"] == 0 ) { echo ""; } else { echo $license_plate; }?>'
if (choice == "1" || choice == "3") {
$("#vehicle-container").show();
$("#license_plate").prop('disabled', true);
showLicense(vehiclePlate);
$("#license_plate").val(data[0]);
} else {
$("#vehicle-container").hide();
$("#license_plate").prop('disabled', false);
//$("#license_plate").val(licensePlate);
}
}
function showLicense(plate) {
$.ajax({
type: 'POST',
url: 'index.php?page=claims&ajax=getplate',
dataType: 'json',
data: { plate: plate },
success: function(data) {
$("#license_plate").val(data[0]);
}
});
}
</script>

Answer 1

Found it. It seemds that some validation-code is the bad guy. Everything works fine when I put this in comment:
<script>
$(function () {
//$("input,select,textarea").not("[type=submit]").jqBootstrapValidation();
changeChoice();
});
...
</script>
I don't really have an idea why, I'm still pretty new with this JavaScript/JQuery stuff, but at least I can find a workaround for the validation that line provided.