Ever needed firebug but for internet explorer?
Well such a thing exists; it's called Internet Explorer Developer Toolbar (yey for ie).
It has about the same functionality as firebug, so it's a great tool.
Somehow it's not as cool as firebug but it does it's job.

After i installed it i had to choose View - Explorer bar - Ie developer toolbar to make it show (unlike View - Toolbars like i expected, and like they said on the site) (also i looked in ie7).

You can also use firebug lite.