zakazivanjeTermina.js
<script>
$(document).ready(function(){
$("#terminVrstaTreninga").click(function(){
$("#terminTrener").empty();
let izbor = $("#terminVrstaTreninga").val();
$(document).ready(function(){ $.get(“ajax/ajax.php?func=treneri&vrstaTreninga=”+izbor, function(odg){ let treneri = JSON.parse(odg) for(i=0;i<treneri.length;i++){ $(“#terminTrener”).append(“<option “value=”+treneri[i].id+”>”+treneri[i].ime+””) } }) }) }) } `

php page

<select class="form-select" name="terminVrstaTreninga" id="terminVrstaTreninga">
<option value="grupni">Grupni</option>
<option value="individualni">Individualni</option>
</select>
<br>
<label for="terminTrener" class="form-label text-start">Odaberite trenera</label>
<select class="form-select" name="terminTrener" id="terminTrener">
</select>
need to fill the terminTrener with the jQuery