If you select "Use JavaScript"
Display: Documents and navigators display faster because hotspot formulas are not evaluated until users click each hotspot.
Buttons: Domino doesn't generate a Submit button automatically.
To allow users to save and close a form on the Web, you must create a button, hotspot, or action that contains these commands:
@Command([FileSave]);
@Command([CloseWindow])
You can have multiple buttons on a form.
If you don't select "Use JavaScript"
Display: Documents and navigators display more slowly because the hotspot formulas are all evaluated at the display time.
Buttons: Domino automatically generates a Submit button, at the bottom of the form.
If there is already one or more buttons on the form, Domino converts the first button it recognizes to a Submit button automatically and ignores all other buttons on the form.
You can have only one button, a Submit button, on a form.