1Test for a specific problem with previousSibling that failed in older versions of WebKit. 2 3On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". 4 5 6PASS walker.firstChild(); walker.currentNode.id is 'A1' 7PASS walker.nextNode(); walker.currentNode.id is 'C1' 8PASS walker.nextNode(); walker.currentNode.id is 'C2' 9PASS walker.nextNode(); walker.currentNode.id is 'D1' 10PASS walker.nextNode(); walker.currentNode.id is 'D2' 11PASS walker.nextNode(); walker.currentNode.id is 'B2' 12PASS walker.previousSibling(); walker.currentNode.id is 'C2' 13PASS successfullyParsed is true 14 15TEST COMPLETE 16 17