IE10????????????3.2.1??????????????????
???ExtJS?????????????
????????????????????

?????ExtJS 3.2.1 ?IE10??????????????
?????????
IE10?????????????????????????
????????????????

???IE10???????????????????2????
----------
1. Tree
Tree?????????????????????????
Tree??????????????????

2. Viewport
???Viewport??????????????????
????????????????????????
IE10????????????????????????????
----------

ext-base.js ????IE10?????
isIE = false, isIE6 = false, isGecko = true ???????
Tree??????????????????????????
?????????????????????????

?????
ExtJS 3.2.1 ????????????????????????
IE10???????????????????????

?????
?????????????????????????????
????????override????????
????????????????????

?????
ExtJS 3.2.1 ?????
IE10????????????????????

????????????????