238670 - cannot scroll this site with the scroll bar - keyboard scrolling works ok, but the left menu doesn't stay in fixed position

Status: RESOLVED FIXED

(Tech Evangelism Graveyard :: English US, defect)

Description

[Mika Halttunen]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040316
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040316

When you try to scroll this site with the scroll bar on the right, it completely
bugs out (screen flashes white, scroll bar position changes randomly etc.). When
you scroll the page with keyboard (arrow keys or PGUP/PGDOWN) it works, but the
menu on the left (Home, My Account, View Cart, etc.) doesn't stay in fixed
position, as it should. It works in Internet Explorer. This may be bad HTML
coding, but IMHO the scroll bar shouldn't freak out like that. Problem applies
also for Firefox.

Also note the different (both wrong) behaviour between when holding the mouse
and dragging the scroll bar, and pressing one of the scroll bar arrows.

Reproducible: Always
Steps to Reproduce:
1. Go to http://www.frontrowdvd.com
2. Try to scroll the page with the scroll bar.
3. Now try scrolling with keyboard.

Actual Results:  
When scrolling with the scroll bar, the bar bugs out. Screen flashes white, and
the page appears to be much longer than it is (being all white).

With keyboard, it works all right, but the menu doesn't stay fixed.

Expected Results:  
The page should scroll as usual, and the menu should stay at the fixed position.

The "Smooth scolling" setting doesn't affect the bug.

Comment 1

[Tim Powell]

I can confirm this even with Mozilla 1.4.1. It appears to be a JavaScript coding
bug. The reason the scrollbar goes crazy is because a tiny scroll movement
causes the left side menu to jump a long way down. The scrollbar is trying to
compensate for the rapidly growing page as the menu moves downward. This is
likely caused by the code in this JavaScript file:
http://www.frontrowdvd.com/fr_menu1.js

Comment 2

[Jesiah S]

I see this on LInux 2004042807 
The problem is that in frMenuMove() it adds 15 to posAim.  But instead of adding
15 it concatenates posAim and 15 as strings. 

Comment 3

[Boris Zbarsky [:bzbarsky]]

This is evang.  The reason it "works" with keyboard is bug 189308 -- once we fix
it, scrolling on this page will sorta be broken altogether.

Comment 4

[sjw]

Seems fixed.
[closeme]