Hi Bill
I believe that how these documents open are dependent upon
the settings for each PC viewing the page. For .PDF content, each
user has the ability to configure the settings for their PDF reader
to choose between whether PDF files open in the browser or in the
PDF reader. Additionally, browser add ins may have a role too. For
example, I use FireFox as my primary browser. I have an add in for
FireFox that allows me to choose what happens when I click a link
that opens a PDF. The add in prompts me for my desired action.
I believe Word is similar, but I'm not sure where you would
go to change the behavior of how it opens. But I do believe there
is a setting on each Windows install that governs how Word
documents are handled when opened from a link on a web page.
Actually, I just conducted a Google search and here is a link
or two that you may find interesting.
Link regarding Word
Documents
Link regarding
PDF Documents
Hopefully this helps... Rick