Test the cssText output of counter-valued CSSPrimitiveValues On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS rules[2].style.cssText is "content: counter(section, decimal); " PASS rules[3].style.cssText is "content: counters(section, ':', decimal); " PASS rules[4].style.cssText is "content: counter(section, lower-roman); " PASS rules[5].style.cssText is "content: counters(section, ',', upper-roman); " PASS rules[6].style.cssText is "content: counter(section, none); " PASS successfullyParsed is true TEST COMPLETE