Conkeror vk audio download

vk-audio-download.js

xkcd_add_title = true;

function trim(str) {
    return str.replace(/\"/g, ""); //"
}

function vkAddbutton(document,node,link) {
    if (node.getElementsByClassName("addon").length>0) return;

    var addon=document.createElement("a");
    var tr=node;

    var title_a=tr.getElementsByTagName('b')[0].getElementsByTagName('a')[0].innerHTML;
    var title_t=tr.getElementsByClassName('title')[0].innerHTML;
/*    if (tr.getElementsByClassName('title')[0].getElementsByTagName('a')) {
        title_t=tr.getElementsByTagName('span')[0].getElementsByTagName('a').innerHTML;
    } */
    var songtitle = title_a+" - "+title_t;
    songtitle = trim(songtitle);

    addon.setAttribute("title",songtitle);
    addon.setAttribute("alt",songtitle);

    addon.setAttribute("href",link);
    addon.innerHTML="\u0441\u043A\u0430\u0447\u0430\u0442\u044C";

    var newdiv=document.createElement("div");
    newdiv.style.fontSize="x-small";
    var addon1=document.createElement("a");
    addon1.setAttribute("href","http://lyrics.wikia.com/"+encodeURIComponent(title_a)+":"+encodeURIComponent(title_t));
    addon1.setAttribute("target","_blank");
    addon1.innerHTML="\u0442\u0435\u043A\u0441\u0442";
    newdiv.appendChild(addon);
    newdiv.innerHTML += " | ";
    newdiv.appendChild(addon1);
    newdiv.className="addon";
    tr.getElementsByClassName('title')[0].appendChild(newdiv);
}

function vkFindAudio(document) {
    var btns=document.getElementsByClassName("play_new");
    for (var i=0; i<btns.length; i++) {
	var rawurl=btns[i].parentNode.parentNode.getElementsByTagName('input')[0].value;
	var url=rawurl.substring(0,rawurl.indexOf(','));
	vkAddbutton(document,btns[i].parentNode.parentNode.parentNode,url);
    };
}

interactive("vk-audio", "show download links",
	    function (I) {
		vkFindAudio(I.buffer.document);
	    });