Your homepage must be named one of the specified files, e.g. default.aspx or index.html; the priority follows the given order.
On an ASP server your start file (the file that is read when a user visits http://www.ditdomæne.dk) must be named one of the following:
The files are read in the order listed above, so the first-mentioned has higher priority than the others.
Article from the support category: ASP & ASP.NET