297482 - Scrolling with the mouse wheel or keyboard does not generate "onscroll" event

Status: RESOLVED DUPLICATE of bug 189308

(Firefox :: General, defect)

Description

[George Simeonov]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4

When scrolling in page using the mouse's wheel or using the keyboard (arrows,
PgUp, PgDn) onscroll event is not generated. If I use the scrollbar's buttons or
drag the scroller the event is generated. I found this error while developing
JavaScript which changes dinamically the position of a HTML element when
scrolling or esizing the window.

I've found another strange side effect while writing the testcase showing the
problem. When I click once on one of the scrollbar buttons many events are
generated and the scrolling does not stop until the scroller reaches the top/bottom.

The attached testcase shows the problem. It just shows alert dialog window when
onscroll event come.

Reproducible: Always

Steps to Reproduce:
1. Open the attached testcase.html.
2. Scroll with the mouse's wheel or the keyboard.
3. Scroll by dragging the scroller.
4. Click once on one of the scrollbar buttons.

Actual Results:  
After the second step nothing happened.
After the third step one or more alert windows with message "scrolling ..."
pop-upped.
After the forth step the windows was scrolled to the top/bottom depending on
which button has been pressed.

Expected Results:  
After the second step event should be generated and pop-up window should pop-up.
After the forth step only one pop-up whindow should appear and the only one row
should be scrolled.

Comment 1

[George Simeonov]

Attachment: testcase demonstrating the problem

Comment 2

[José Jeria]

*** This bug has been marked as a duplicate of 189308 ***