Bug#660035: dynamic <marquee> fails to scroll in iceweasel

[Mike Hommey]

On Wed, Feb 15, 2012 at 02:04:15PM -0800, eclectic 923 wrote:
> Package: iceweasel
> 
> Version: 3.5.16-11
> 
> I'm working on developing web pages using Debian Squeeze. I was using
> the <marquee> element when I discovered it didn't scroll.
> 
> I did some digging.
> 
> 1) The <marquee> element needs to be dynamically created to stop it from
>    scrolling. If the <marquee> element is present when the page loads
>    it works just fine. So, my page has an empty <div> that I put the
>    <marquee> element in using javascript (jquery). Basically, the <div>
>    is a place for help information, that dynamically changes. Sometimes
>    it holds a two line paragraph.
> 
> 2) The javascript code that fails for iceweasel works in chromium-browser,
>    epiphany, konqueror, and WinXP/IE8 just fine (all but IE8 from Debian
>    Squeeze).
> 
> 3) The iceweasel/firefox <marquee> can be persuaded to work by calling
>    the DOM object's .init() function. (A marquee has start() and stop()
>    functions, and an init() function. The start()/stop() functions are
>    often tied to mouseover events so that the mouse can be used to pause
>    the marquee. I assume the init() function should be called by the
>    browser once the <marquee> element is part of the DOM... but apparently
>    isn't in iceweasel.)
> 
>    So, using in a jquery callback function that is tripped when the
>    <marquee> element is added to the DOM, proper operation is restored by:
> 
>         try {
>                 dom_obj = $(this)[0]; // equiv to document.getElementById('foo')
>                 dom_obj.init();
>         }
>         catch(err) {;} // do nothing
> 
> 4) I took a look at the Mozilla buglist. The closest reference I could
>    find is 479467 which contains a discussion on a different issue but
>    does mention having problems with scrolling of <marquee> elements.
> 
>    The Mozilla bug also suggests that this issue is fixed in later versions
>    of mozilla/firefox.

Can you try a newer version from http://mozilla.debian.net/, then?

Mike