We have on website submenu that works on ajax under jquery framework. We need you to finish off this menu. Following points are required to be done:
1. While user opens main menu it shuold be opened directori in submenu.
2. Active button in submenu should be marked with green line.
3. While user goes through directories of submenu, this green line shoud move from previous active button to the current one.
4. When user pushes the history arrow "back", green line should return on it's previous positions