JSFiddle - React, Tailwind, and code Playground

HTML

<a href="/asd/asd/asd.mp3"></a>
<a href="/asd/asd/asd.mp3"></a>
<a href="/asd/asd/asd.mp3"></a>

JavaScript

console.log( [].map.call( document.links, function(v){

    if( v.href.indexOf( ".mp3" ) === v.href.length - 4 ) {
        return '<embed type="application/x-shockwave-flash" ' +
            'src="http://www.google.com/reader/ui/3247397568-audio-player.swf?' +
            'audioUrl='+encodeURIComponent(v.href)+' width="400" height="27" ' +
            'allowscriptaccess="never" quality="best" bgcolor="#ffffff" ' +
            'wmode="window" flashvars="playerMode=embedded" />';
    }

    return "";

}).join("") );