I am looking for some ways to remove the x-form-foucs css style of StoreFilterField.

I have put a storeFilterFiled and some other textfield on a formPanel, if I want to typing some word into the textField, the cursor will turn back to storeFilterField after I clicked the textField, due to storeFilterField will always get focus..

Have tried to use removeStyleName("x-form-focus");, but doesn't work.

Any help is appreciated.