How to redirect to URL/submit button on time out of page?

[oTree User]

In order to prevent that participants take too long for my experiment on the last page, I want them to redirect to a URL (Prolific completion url) on a specified automatic time-out of the page.

I tried it with jQuery and the finish.countdown function. I have this code:

Pages:

timeout_seconds = 35

timer_text = 'Unless you continue, page will auto-submit in:'

Javascript:

<script>

$(function () {

        $('.otree-timer__time-left').on('update.countdown', function (event) {

            if (event.offset.totalSeconds === 20) {

                $('.otree-timer').show();

            }

        });

    });

    $(function () {

        $('.otree-timer__time-left').on('finish.countdown', function () {

            window.open("https://google.com", "_blank");

        });

    });

</script>

<style>

    .otree-timer {

        display: none;

    }

</style>

Somehow, it is not working and I cannot find the problem. It only shows "No more pages left." and does not redirect. What would also work for me would be to make a button be submitted on timeout.

[Tobias]

You could use a meta tag 

<meta http-equiv="refresh" content="10; URL=https://www.google.com" />

In this example, the participant is redirected to google.com after 10 seconds.

No need for timeouts or jquery