Blockland Forums Youtube Embed

// ==UserScript==
// @name       YT Embed
// @version    0.21
// @description  Automatic Youtube video embedding for the blockland forums.
// @include    http://forum.blockland.us/index.php?topic=*
// @copyright  2012+, Kingdaro
// ==/UserScript==

var links = document.getElementsByTagName('a');

var i;
for (i in links){
    var link = links[i];
    var code = '';
    if (link.href.search('youtube.com')>-1){
        var from = link.href.search('v=')+2;
        var to = from+11;

        code = link.href.substring(from,to);
    }else if (link.href.search('youtu.be')>-1){
        var from = link.href.lastIndexOf('/')+1;
        var to = from+11; //no need for anything too complicated for youtu.be links.

        code = link.href.substring(from,to);
    }

    if (code!=''){
        link.href = null
        link.innerHTML = '<iframe src="http://www.youtube.com/embed/'+code+'" width="640" height="390" allowfullscreen></iframe>'
    }
}