var expander = a.before('<span class="expander"></span>').prev(); 
var expander = a.before('<span class="expander">&#x200b;</span>').prev(); 
  rows.each(function () {    var a = $(this).find("a.dir");    if (a.length) { // then the entry is a folder      // create new folder id      var folderid = "f" + FOLDERID_COUNTER++;      this.id = folderid;      $(this).addClass(folderid);      // add the expander icon      a.wrap('<div></div>');      var expander = a.before('<span class="expander"></span>').prev();      expander.css("cursor", "pointer")        .attr("title", "Expand sub-directory in place").click(toggleDir);    }    // tie that row to ancestor folders    if (parent_tr)      $(this).addClass(ancestor_folderids.join(" "));  });
1293	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1293/b1675aeb746475f0d5004eb991445e308ba45aed/expand_dir.js/buggy/trac/htdocs/js/expand_dir.js