OpenERP Developer Mode modification

[danger89]

If we do some modification to our form views in Openerp 7 Developer mode (Ex : add onchange function and when it called some fields goes invisible)is this modification automatically added to relevant view.xml files ?I done such a thing.but my account_view.xml file not updated.but in database side ir_ui_view table saved with that record.please advice me to find that where is my missing point.?EDITED : actually my account_view.xml cannot change.but when i'm change some changes to other view.xml files, they shows result when i restart the server & upgrade the modules.but only when i change this account_view.xml file its not gives a result.but when i do some changes to account view through "Developer mode" they affected.help me to seek what is the issue with that ?(seems not using my account_view.xml) i tried to some simple changes also like menu item text change.they also not affected.but when i do for other module's view.xml they affected