That code is for previous versions of LimeSurvey. For the current version and the upcoming 3.x, use this code which applies to the Bootstrap progress bar.
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
var progressValue = 32;
$('.progress-bar').css({
'transition': 'width 0s ease 0s',
'width': progressValue+'%'
}).attr('aria-valuenow', progressValue).text(progressValue+'%');
});
</script>