find.js

    function find(root, obj) {
      var seen = [];
      function search(root, name, depth) {
        if (root === obj) {
          console.log(name);
          return;
        }
        if (!depth) { return; }
        if (seen.indexOf(root) >= 0) { return; }
        if (typeof root !== "object") { return; }
        seen.push(root);
        try {
          Object.getOwnPropertyNames(root).forEach(function (key) {
            search(root[key], name + "." + key, depth - 1);
          });
        } catch (err) {}
      }
      search (root, "root", 5);
    }