script to read the time on an audio file

1// Create a non-dom allocated Audio element
2var audio = document.createElement('audio');
3
4// Add a change event listener to the file input
5document.getElementById("fileinput").addEventListener('change', function(event){
6    var target = event.currentTarget;
7    var file = target.files[0];
8    var reader = new FileReader();
9  
10    if (target.files && file) {
11        var reader = new FileReader();
12
13        reader.onload = function (e) {
14            audio.src = e.target.result;
15            audio.addEventListener('loadedmetadata', function(){
16                // Obtain the duration in seconds of the audio file (with milliseconds as well, a float value)
17                var duration = audio.duration;
18            
19                // example 12.3234 seconds
20                console.log("The duration of the song is of: " + duration + " seconds");
21                // Alternatively, just display the integer value with
22                // parseInt(duration)
23                // 12 seconds
24            },false);
25        };
26
27        reader.readAsDataURL(file);
28    }
29}, false);