I know the first page of the website needs to have an index.html file, then the other pages of a web site can be Flash/SWF files.

I have made a web site and the first file is index.html (with my Flash SWF file embedded inside it), which is an intro page. Then I have a separate Flash/SWF file for the main functional web pages.

What type of coding do I need as a button to open a completely separate Flash/SWF file, so it remains in the same browser window.