FIle API - Phonegap (File List In Directory)

gistfile1.js

document.addEventListener("deviceready", onDeviceReady, false);

// PhoneGap is ready
//
function onDeviceReady() {
    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccess, fail);
}

function onFileSystemSuccess(fileSystem) {
    fileSystem.root.getDirectory("Music", {create: false, exclusive: false}, getDirSuccess, fail);
}

function getDirSuccess(dirEntry) {
    // Get a directory reader
    var directoryReader = dirEntry.createReader();

    // Get a list of all the entries in the directory
    directoryReader.readEntries(readerSuccess,fail);
}

function readerSuccess(entries) {
    var i;
    for (i=0; i<entries.length; i++) {
        // Assuming everything in the Music directory is an mp3, go nuts
        // otherwise check entries[i].name to see if it ends with .mp3
    }
}