osu! HTML5 audio playback

userscript.js

// ==UserScript==
// @name         osu! HTML5 audio playback
// @namespace    http://your.homepage/
// @version      0.1
// @description  Replaces the osu! Flash audio preview with an HTML5 one.
// @author       mcpower
// @match        https://osu.ppy.sh/p/beatmaplist*
// @match        https://osu.ppy.sh/s/*
// @match        https://osu.ppy.sh/b/*
// @grant        none
// ==/UserScript==
window.audio = new Audio();
window.audio.volume = 0.45;

window.play = function play(id, iscallback) 
{
    if (!audio.paused && playingid == id){
        audio.pause();
        audio.currentTime = 0;
        return false;
    }

    playingid = id;
    audio.src = STATIC_DOMAIN_BEATMAP + "/preview/" + id + ".mp3";
    audio.play()
    return true;
}

window.audio.onended = function() {
    $('.bmlistt>.icon-pause').removeClass("icon-pause").addClass("icon-play");
}