if(h > row_h){

                        var offset = row_h - (h+12);

                        YUD.setStyle(m.nextElementSibling,'display','block');

                        YUD.setStyle(m.nextElementSibling,'margin-top',offset+'px');

                    };

                }

                YUE.on(YUQ('.expand'),'click',function(e){

                    var elem = e.currentTarget.parentNode.parentNode;

                    YUD.setStyle(e.currentTarget,'display','none');

                    YUD.setStyle(elem,'height','auto');

                    //redraw the graph, line_count and jsdata are global vars

                    set_canvas(100);

                    var r = new BranchRenderer();

                    r.render(jsdata,100,line_count);

                });

                // change branch filter

                YUE.on(YUD.get('branch_filter'),'change',function(e){

                    var selected_branch = e.currentTarget.options[e.currentTarget.selectedIndex].value;

                    var url_main = "${h.url('changelog_home',repo_name=c.repo_name)}";

                    var url = "${h.url('changelog_home',repo_name=c.repo_name,branch='__BRANCH__')}";

                    if(selected_branch != ''){

                        window.location = url;

                    }else{

                        window.location = url_main;

                    }

                });

                function set_canvas(width) {

                    var c = document.getElementById('graph_nodes');

                    var t = document.getElementById('graph_content');

                    canvas = document.getElementById('graph_canvas');

                    var div_h = t.clientHeight;

                    canvas.setAttribute('height',div_h);

                    canvas.setAttribute('width',width);

                };

                var heads = 1;

                var line_count = 0;

                var jsdata = ${c.jsdata|n};

                for (var i=0;i<jsdata.length;i++) {

                    var in_l = jsdata[i][2];

                    for (var j in in_l) {

                        var m = in_l[j][1];