rem: return results.length > 0 ? results : null; 
add: return results; 
context: function eval_css(css, inDocument){    var results = cssQuery(css, inDocument);    return results.length > 0 ? results : null;}
meta: 3428	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3428/d1319b62eeb691ccd575cc3d308ad1b9672a4351/ui-element.js/clean/src/content/ui-element.js