[fix]by Jinqn queryCommandValue是取不到背景的bug,trace 3751
[fix]by Jinqn queryCommandValue是取不到背景的bug,trace 3751
[fix]by Jinqn queryCommandValue是取不到背景的bug,trace 3751
Merge pull request #63 from Jinqn/dev-1.3.0

Dev 1.3.0 修复ie9下queryCommandValue是取不到背景的bug