Test support for CSSStyleDeclaration.cssFloat On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS 'cssFloat' in testDiv.style is true PASS Object.getOwnPropertyNames(testDiv.style).indexOf('cssFloat') is -1 PASS Object.getOwnPropertyNames(Object.getPrototypeOf(testDiv.style)).indexOf('cssFloat') != -1 is true PASS testDiv.style.cssFloat is "" testDiv.style.cssFloat = 'right' PASS testDiv.style.cssFloat is "right" testDiv.style.cssFloat = 'invalid' PASS testDiv.style.cssFloat is "right" testDiv.style.cssFloat = 'left' PASS testDiv.style.cssFloat is "left" testDiv.style.cssFloat = null PASS testDiv.style.cssFloat is "" PASS successfullyParsed is true TEST COMPLETE