boards/static/js/refmaps.js

function addRefLinkMap() {
    var postByNum = [], refMap = [];

    $('.post').each(function() {
        var self = $(this);

        var postNum = self.attr('id');
        //add post by id
        postByNum[postNum] = self;
        //add ref link
        self.find('p').children('a').each(function() {
            if($(this).text().indexOf('>>') == 0) {
                var refNum = $(this).text().match(/\d+/);

                if(postByNum[refNum]) {
                    if(!refMap[refNum])
                        refMap[refNum] = [];

                    //if !exist
                    if((',' + refMap[refNum].toString() + ',').indexOf(',' + postNum + ',') < 0) {
                        refMap[refNum].push(postNum);
                    };
                }
            }
        });
    });

    var label_replies = gettext('Replies') + ':';
    for(var pNum in refMap) {
        if(typeof refMap[pNum] === 'object') {
            //append refmap panel
            if(!$("#refmap_"+pNum).length) {
                $('#'+pNum+'').find('.message').after(
                    $('<div class="refmap" id="refmap_'+pNum+'">'+label_replies + refMap[pNum].toString().replace(/(\d+)/g, ' <a href="/jump/$1/">>>$1</a>')+'</div>')
                );
            }
        }
    }
}