Javascript html5 audioplayer swapper and remember me function

javascript-audio-tag-extras.js

/*
    This code it's a mix of some good javascript fixes, a cookie manager, and audio tag features.
    It ads those functions:
        - Auto stop other players when starting a new one (avoid multiple sounds at time)
        - Remember status of player via cookie, to autostart radio if the user wants.

    Related links: 
        http://stackoverflow.com/questions/19790506/multiple-audio-html-auto-stop-other-when-current-is-playing-with-javascript/29045474#29045474
        http://stackoverflow.com/questions/14573223/set-cookie-and-get-cookie-with-javascript#24103596
*/

// cookie's stuff
function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}

// default audio autoload
players = document.getElementsByTagName("audio")
//~ players[0].play() // uncomment that to enable autoplay

if (readCookie("player") == "1") {
    players[0].play()
}

// pause other players at play (if any) in example, podcasts previewing while listening radio or other
window.addEventListener("play", function(evt)
{
    // first, create a cookie because a player was pressed
    createCookie("player", "1")
    
    // pause the current active player
    if(window.$_currentlyPlaying && window.$_currentlyPlaying != evt.target) // avoid pause element if it's same than previous
    {
        window.$_currentlyPlaying.pause();
    } 
    window.$_currentlyPlaying = evt.target;
}, true);

// set cookie to 0 when paused
window.addEventListener("pause", function(evt)
{
    createCookie("player", "0")
}, true);