[Greasemonkey] web page javascript generated html removal

Thu Apr 6 22:23:26 EDT 2006

On 4/6/06, Dano Carroll <dano at xernolan.org> wrote:
> I've been banging my head against a wall (otherwise known as learning)
> about how to override a web site's need to load a flash doohickey
> every time I go to any web site in a particular domain. Don't answer
> yet, read on, this does have to do with greasemonkey. I have been
> using privoxy to simply disable flash loading completely and it has
> worked up to now.
>
> Now this web site is checking to see if flash is installed in my
> browser and popping up an annoying alert every time it fails to find
> it. Fine, I'll just use greasemonkey and override the javascript that
> checks for the presense of flash. Nope, greasemonkey gets loaded too
> late in the game (for a very good reason, I know) and I can't do the
> override thing. Well maybe I can simply remove the html that puts the
> flash thing on the screen. I find that the site's javascript is creating
> tables to layout this flash thing so I write a greasemonkey script to
> remove all tables to see if I'm on the right track. I put in GM_logs
> and find that the script seems to be working. However, all the layout
> is intact. I go to the DOM browser and see all those tables there that
> supposedly had been deleted. Is there anything I need to do to commit
> the changes? Is something happening like:
>
> 1. load the html, running loaded scripts as they are encountered.
> 2. greasemonkey script is run, removing the html generated by the
> loaded javascript.
> 3. page is re-loaded due to the change or finally rendered causing the
> loaded javascript to be re-run, regenerating the html I had just removed.
>
> Thanks,
> Dano
>
> --
>
> "I aim to misbehave" - Malcom Reynolds, Captain/Owner of Serenity
>
>

Since you're using privoxy anyway, you might as well just insert a
script block at the beginning of <head>, doing:

window.alert = function(){}

No more alerts.  If you do want some, you can always set it back via
GM... (noting that the safe window's alert() is unchanged, and you can
stick it back onto the unsafeWIndow)

--
Mook
mook.moz at gmail