audio video for Publishers - HTML5 for Publishers - page 35

Figure 3-1. Audio-enabled glossary in iBooks
function set_up_audio() {
var epub_audio = document.getElementById("epub");
var mobi_audio = document.getElementById("mobi");
var pdf_audio = document.getElementById("pdf");
// Add play button functionality
var epub_play_button = document.getElementById("epub_button");
var mobi_play_button = document.getElementById("mobi_button");
var pdf_play_button = document.getElementById("pdf_button");
epub_play_button.addEventListener("click", play_epub, false);
mobi_play_button.addEventListener("click", play_mobi, false);