custom javascript elements in head section of html

Hi everyone,
I am new user to Drupal. I have only recently installed Drupal and am testing it. I have found the community to be very suppportive.
A site I am trying to port to Drupal uses pages with javascript for hiding/showing layers as a user mouseovers an image map. For this I need to uses a custom stylesheet and also place javascript functions in the head section of the page.
Also is it ok to uses an image map and place java script calls with in the page. Does the 'create page' box allows java script elements ?
What is the best way to create pages like about us, contact us ?
How do I do these ?
Advance Thanks
Regards
Karthik

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