I have fount the source of problem:
(enter anywhere after "//Add stuff to the toolbar" on TasksTopToolbar.js)
This code must be placed to TasksBottomToolbar.js, not in TasksTopToolbar.js, because last one don't have the this.statusCombo object.
I move code to TasksBottomToolbar.js and it goes to work.
But work only one time: first click on any button works (it filter tasks normally), but second and other clicks shows JS error and don't filter (but successfully change the values in select boxes), the error is:
Error: this.load is not a function
Source File: /public/assets/javascript/og/og.js
Line: 1639Browser is Firefox 3.6, FengOffice 1.7.