How to update div when on select change in jquery

Answer 1

Try something like that :

<select id="choose">
    <option value="test1">Test1</option>
    <option value="test2">Test2</option>
    <option value="test3">Test3</option>
</select>
<div id="update"></div>

<script type="text/javascript">
    $('#choose').change(function(event) {
        $('#update').html('This is ' + $('#choose').val() + ' and other info');
    }); 
</script>

---

If you want to make it with AJAX, change the javascript function to something like that:

<script type="text/javascript">
    $('#choose').change(function(event) {
        $.post('info.php', { selected: $('#choose').val() },
            function(data) {
                $('#update').html(data);
            }
        );            
    });
</script>

And in your info.php, you'll have something like:

<?php

    $selected = isset($_POST['selected']) ? $_POST['selected'] : 'nothing';
    echo("This is $selected and other info");