function enableBlame(url, original_path) {  var message = null;  var message_rev = null;  function getOffset(elem) {    elem = $(elem).get(0);    var offset = {left: 0, top: 0};    do {      offset.left += elem.offsetLeft || 0;      offset.top += elem.offsetTop || 0;      elem = elem.offsetParent;    } while (elem);    return offset;  }  /* for each blame cell containing a changeset link... */  var rev_paths = {};  $("table.code th.blame a").each(function() {    href = $(this).attr("href");    rev_href = href.substr(href.indexOf("changeset/") + 10);    elts = rev_href.split("/");    var path = elts.slice(1).join("/");    if (path != original_path)      rev_paths["r"+elts[0]] = path;  });  /* for each blame cell... */  $("table.code th.blame").each(function() {    var rev = $(this).attr("class").split(" ")[1]; // "blame r123"    var path = rev_paths[rev] || original_path; // only found if != orig    if (!rev)      return;    $(this).click(function() {      var row = this.parentNode;      var message_is_visible = message && message.css("display") == "block";      var highlight_rev = null;      function show() {        /* Display commit message for the selected revision */        var message_w = message.get(0).offsetWidth;        // limit message panel width to 3/5 of the row width        var row_w = row.offsetWidth;        var max_w = (3.0 * row_w / 5.0);        if (!message_w || message_w > max_w) {          message_w = max_w;           var borderw = (2+8)*2; // borderwidth + padding on both sides           message.css({width: message_w - borderw + "px"});        }        var row_offset = getOffset(row);        var left = row_offset.left + row.offsetWidth - message_w;        message.css({display: "block", top: row_offset.top+"px", left: left-2+"px"});      }      function hide() {        /* Hide commit message */        message.css({display: "none"});        /* Remove highlighting for lines of the current revision */        $("table.code th."+message_rev).each(function() {           $(this.parentNode).removeClass("hilite")         });      }      if (message_rev != rev) {              // fetch a new revision        if (message_is_visible) {          hide();        }        message_rev = rev;        highlight_rev = message_rev;        $.get(url + rev.substr(1), {annotate: path}, function(data) {          // remove former message panel if any          if (message)            message.remove();          // create new message panel          message = $("<div>").addClass("message").css({            position: "absolute", zIndex: 2          }).appendTo("body"); /* add a close button somehow... */          // fill in changeset data          message.html(data || "<strong>(no changeset information)</strong>");          show();        });      } else if (message_is_visible) {        hide();      } else {        show();        highlight_rev = message_rev;      }      /* Highlight all lines of the current revision */      $("table.code th."+highlight_rev).each(function() {         $(this.parentNode).addClass("hilite")       });    });  });}