When the "internal web site" on Small Business Server launches the sharepoint
site, the IE browser (and others) do not have a URL, buttons or other
navigation on a normal browser page. This is all ok when the users click on
the breadcrumbs to get "back" to a page, but when the user clicks on a PDF
document in a list, the window shows the PDF with no way to get back to the
site. I've tried right mousing and left clicking everywhere and the ctrl
left arrow.

Any ideas?