Noob question for a simple intro page - centrally align image

Very noob question,

I want to make a really simple intro page ... just a big image in the middle of the page with some button links on

I made it in Dreamweaver and centrally aligned it but if I open up on a smaller browser window, on the bottom it shows the horizontal slider which I don't want it too

I know why, coz my image I'm using is 1200 pixels wide --- but I don't want to use it as a background image as I have links on it used as maps

Anyone help a quick solution?

http://www.hamiltonwatch.com/webapp/...10/index1.html