Phutaba Backlinks Fixed

/* * * * * * * * * *
 * Phutaba Backlinks
 * Based on a Kusaba-X script Ernst found while lurking the internets.
 */

/* Prepare for backlinks insertion  */
var blcss = ".backlinks{font-style:italic;font-size:11px;padding-right:4px;margin-left: 1.2em;margin-bottom: 0.6em;display: block;} .backlinks:not(:empty)::before{content:'Replies: '!important;white-space: pre;} a.bl{font-style:italic;font-size:11px; padding-right:4px;}"
var blstyle = document.createElement('style');
blstyle.appendChild(document.createTextNode(blcss));
blstyle.type = 'text/css';
document.head.appendChild(blstyle);
var z;
var replies = document.getElementsByClassName('post');
var replieslen = replies.length;
for (z=0;z<replieslen;z++){
            var ondebl = replies[z].parentNode.id;
            var blcontainer = document.createElement('span');
            blcontainer.setAttribute('id','bl' + ondebl);
            blcontainer.setAttribute('class','backlinks');
            replies[z].appendChild(blcontainer);
}


/* Create backlinks */
function updateBackLinks() {
    var i;
    var links = document.getElementsByTagName('a');
    var linkslen = links.length;
            for (i=0;i<linkslen;i++){
                    var linksclass = links[i].getAttribute('class');
                    var testref = links[i].parentNode.getAttribute('class');
                    if (linksclass == null && testref == "backreflink") {
                            var onde = links[i].href.substr(links[i].href.indexOf('#') + 1);
                            var quem = links[i].parentNode.parentNode.parentNode.parentNode.parentNode.id;
                            var br = links[i].href.substring(0, links[i].href.indexOf('/thread'));
                            br = br.substring(br.lastIndexOf('/')+1);
                            var tr = links[i].href.substring(links[i].href.lastIndexOf('/')+1, links[i].href.lastIndexOf('#'));
                            addBackLinks(quem, onde, tr, br);
                            var replylinks = 'repback' + onde + br;
                    }
            }

        function addBackLinks (quem, onde, tr, br) {
            var ondeid = document.getElementById(onde);
            if (ondeid != undefined) {
                    var onderefl = document.getElementById('bl'+onde);
                    if (onderefl.innerHTML.indexOf(quem) == -1){
                            var e = document.createElement('a');
                            e.innerHTML='<u>>>' + quem + '</u>';
                            e.setAttribute('href','#' + quem);
                            e.setAttribute('class','bl');
                            onderefl.appendChild(e);
                            return linkslen++;
                    }
            }
        }
    return 0;
}

/* Add backlinks */
updateBackLinks();