Please help me quick!

[LigShot]

Hello! I have a now playing script in a HTML page.It work but it dosen't refresh after the song change.What am I need to change to this code to refresh automatically after a song change?

code:
<script>

$(document).ready(function(){

    $("#front_video").fitVids();

    

    getData();

    setInterval(function() {

        getData();

    }, 3000);

    

    function getData(){

        $.get('output_file.txt', function(data) {

        	$('.now-live span').html(data);	

        });	

    }

});

</script>

Sorry for my English!

Thank you in advice!