expander.siblings("tr."+expander.get(0).id).hide(); 
tr.siblings("tr."+this.id).not(this).hide(); 
    tr.siblings("tr.collapsed").each(function() {      expander.siblings("tr."+expander.get(0).id).hide();    });
1293	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1293/98e9eab412de2ee004db07c557c4fcfb2c1fe0d3/expand_dir.js/buggy/trac/htdocs/js/expand_dir.js