custom data entry web database

I would like a web database app for data entry and reporting. The system design should be modular to allow dynamic page element loading and the re-use of every module, function, element, etc. Im not too worried about having a beautiful looking layout, it just needs to be clean and allow easy reading of large amounts of text data fields. *** Required Global System Design/Features *** 1) Modular, re-usable, Minimal Hard-Coding – All elements (e.g. TextArea, grid, chart, etc.) should not be hard coded on separate pages. I assume there will be only one page ([login to view URL]) which has dynamic elements/data fields, added from Ajax functions. There maybe other pages that have hard-coded methods, support functions, etc. but are not directly accessible by users. 2) Ajax Auto-Save for New Data - All input fields must save user’s input data regularly into a “draft_data” table (like the Gmail email composer). Maybe triggered by onChange or onBlur? What ever is best method. 3) Extensible - All functions/methods should be extensible and easily upgradable with very little dependencies on other functions/modules (i.e System code structure should be flexible to allow addition of new functions or new record types via addition of new code segments with simple programming). 4) Drop-Down menu, Ajax Suggestions – All labels, Textareas, data fields, etc. will have dropdown menus that show links and suggestions based on the user input (like the [login to view URL] search bar). 5) Graphs, Charts, Grids – Enable/Show simple editable grids, flash charts and graphs, images, videos, SWF objects, etc. Also, allow export of grid/chart data to file, CSV, excel, simple PDF, etc. 6) Changeable CSS Theme – Colour theme and background images should be easily changed by using different css files.