- Drop down's drops down but can't click on it but with keybord it's functioning
- Buttons not doing anything
- In the column settings In ALV table are not working (up - down, add - remove buttons)
These problems are caused mostly by Browser and SAP's Unified Rendering engine mismatch, as in the newer browsers the rendering engine is also changing. If you are using a newer browser on an older system (or at least an old Unified Rendering) you can get such errors on the page. To solve page errors you need to have an up to date version from this UR engine. To update it plese check this wiki page: http://wiki.scn.sap.com/wiki/x/2oQCFQ
For testing you can use the "built in" test Web Dynpro application WDR_TEST_UI_ELEMENTS. Here you can choose from different type of visual objects. You can test also events, for example a button's click event.