Multitouch handler for "Chpok!" iOS game

gistfile1.js

this.addEventListener('touchstart', function(e) {
    for(var i in e.touches) {
        var touch = e.touches[i];
        var node = touch.target;

        if (node.className == 'bubble') {
            node.className = 'bubble done';
            PhoneGap.exec("SoundPlug.play", "sound.m4a");
        }
    }
});