fix d&d test case (ensure d&d work fine is enough)
add test case
Merge pull request #37 from huangnoah/fix-20130110

Fix 20130110
Merge pull request #39 from huangnoah/new-20130110

New 20130110
add ie6 crash test case to ztl.ignore
Merge pull request #40 from huangnoah/fix-2.28-20130110

add ie6 crash test case to ztl.ignore