[stackoverflow] confirm on selection change

3897905/verify-before-confirmation-message

HTML

<select id="select">
    <option value="1">One</option>
    <option value="2">Two</option>
    <option value="3">Three</option>
</select>
<br>
<textarea id="text"></textarea>

JavaScript

var oldVal = $('#select').val();
$('#select').change(function() {
    if ($('#text').val() != '') {
        if (confirm('change ?')) {
            oldVal = this.value;
        } else {
            this.value = oldVal;
        }
    } 
    /*else {
        this.value = oldVal;
    }*/
});