   lineElt.style.background = "#" + col + col + col;
        lineElt.style.width = Math.max(Math.round(line.height / 3), 1) + "px";
      }
    } else {
      out.appendChild(document.createElement("div")).innerHTML =
        "<b>node</b>: " + node.size + " lines, " + Math.round(node.height) + " px";
      var sub = out.appendChild(document.createElement("div"));
      sub.style.paddingLeft = "20px";
      for (var i = 0; i < node.children.length; ++i)
        drawTree(sub, node.children[i]);
    }
  }
  dr