Search for .mp3 files in main folder and subfolders

im looking to make a web player from scratch so I can control my music from my phone. I've got a listing of all files within a folder done, but I need to get it to list the files within the subfolders of the main folder.

So sort of something like \Path\ - Shows all in \Path\ and \Path\subs\ shows the contents of all subfolders.

This is the code that I have written to allow me to search a folder for .mp3 files, but I cannot pin the way to search in subfolders as well.

$.ajax({
    url: "music/",
    success: function(data){
        $(data).find("a:contains(.mp3)").each(function(){
            var files = $(this).text().replace(/  /g, '');
            files = $(this).text().replace(/.mp3/,'');
            $('<p></p>').html(files).appendTo('#displayer');
            $('#displayer > p:nth-child(odd)').css('background-color','#DDD');
        });
    }
});

Many thanks in advance