From what I red, element hiding doesn't support * in domain names, how I would use this then?
world*.runescape.com##DIV#menubox
If I use runescape.com##DIV#menubox it blocks some menus at main page which I don't need to be blocked
Hiding Runescape element
well, there is no really good way to do this. You could either add a filter for each of world subdomains (if you only play on a reasonable amount of them). Or you you can use the advanced view of the element hiding helper and try to find a difference between the menus ingame and on the homepage. Or you just use the filter as it is now and whitelist the homepage (add @@|http://www.runescape.com/title.ws|$document as a filter), but then you also get to see the ads there...
Re: Hiding Runescape element
There's a Grease Monkey that can do it: http://userscripts.org/scripts/show/50526