i am having a site which is having good rank in google... now i have planned to flash header for my site to make it more professional. i heard that google won't like flash animations, so if i add, then my ranking goes down ????????
Having flash elements on your site is fine - it's having an all flash site that's a problem, as bots can't see most of it.
It only does have a slight -ve effect if its too heavy. Besides the fact that many internet users don't have flash extension installed then it should be fine.