the only way is to build your site in flash. The browser picks put the web page in html, php, htm, asp and so on, if it does pick this up one of to things will happen . 1/ it will go to the index page. 2/ you will get page not found.

But things said you could have a iframe that pulls all the page into it on the index page. yet this can cause a lot of problems when googled. search engines can and will send viewers to the corresponding page and not to the index.