There are a few sites around that show the different types of DOCTYPES
for html sites and stuff. But I don't seem to find anywhere which
doctype to choose when I made a html website.
Can anyone tell me or point me to something that tells me when I made
a website which code for the DOCTYPE to choose.
The difference between frameset and the other one is ... obvious but
which html version for example should I take.
I make my sites with DW4 by the way.
A very useful (boring but useful) thing to do is take some time to read
various HTML specifications. Besides learning a lot in general, you'll
be able to answer your question.

But you might not have the time or
wherewithall to do that right now, which makes sense because they are
long.
You will probably be choosing between HTML 4.01 Strict and HTML 4.01
Transitional, unless you are using XHTML. Documents which conform to the
HTML 4.01 Strict specifications follow a tighter set of rules than those
which conform to HTML 4.01 Transitional. If your web pages include some
"deprecated" elements such as FONT or other various presentational
attributes, you would want to use HTML 4.01 Transitional. The HTML 4.01
specification, available at <
http://www.w3.org/TR/html4/>, tells which
attributes are deprecated and which aren't. There is also (somewhere out
there on the Internet) a nifty HTML reference sidebar for Mozilla which
does the same in a more concise fashion.
You can see whether your page conforms to the Strict or Transitional
specifications by putting one of the respective doctype declarations on
top of your documents and validating them at an HTML validator. The most
well-known one is <
http://validator.w3.org/>, but I recommend
<
http://www.htmlhelp.com/tools/validator/>, because the htmlhelp.com
version is less of a git about errors.
You could get further help and explanation on which doctype to choose by
supplying your site's URL to this newsgroup.