This tests checks parsing of the '-webkit-transform-origin' property and in particular that specifying invalid z values discards the property. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS test("-webkit-transform-origin: 10% 10% 10%", "-webkit-transform-origin") is null PASS test("-webkit-transform-origin: 10% 10% 10px", "-webkit-transform-origin") is "10% 10% 10px" PASS test("-webkit-transform-origin: 10px 10px 10%", "-webkit-transform-origin") is null PASS test("-webkit-transform-origin: 10px 10px 10px", "-webkit-transform-origin") is "10px 10px 10px" PASS test("-webkit-transform-origin: left top 10%", "-webkit-transform-origin") is null PASS test("-webkit-transform-origin: left top 10px", "-webkit-transform-origin") is "0% 0% 10px" PASS test("-webkit-transform-origin: left top left", "-webkit-transform-origin") is null PASS successfullyParsed is true TEST COMPLETE