essentially have a page with one layout and a series of txt files for content. The txt files all fit nicely into that layout.

Currently I have several .shtml files all with only one word difference. the filename in the <include "filename">.

I would like to know if there is a way to have one .shtml file and have ONLY the <include "text file name"> tag changed by clicking a link that way I could have only one layout page to modify if I need to make changes and it would affect the whole site.

Any ideas?