Test 03
HTML
<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<form>
<button type="submit" id="submit">Submit</button>
</form>
JavaScript
$('#submit').click(function() {
return should_i_submit();
})
function should_i_submit() {
var r = confirm('Submit?');
if(!r) return false;
}