You can use the "timeout"-function.
Put this javascript snippet into the sourcecode of the question.
Code:
<script type="text/javascript" charset="utf-8">
$(document).ready(function(){
setTimeout(function () {
$('#ls-button-submit').trigger('click');
}, {TOKEN:ATTRIBUTE_1});
});
</script>
This will trigger the "Next" button.
Remember: This function expects the time in milliseconds.
I think this is sufficient, if you only want proceed to the next question.
And you may include something like this in the text
Your maximum time to answer is: {TOKEN:ATTRIBUTE_1/1000} sec
Joffm