Now this is another question, because chapter points are usually used
in reference to Quicktime player, and they are reference points which
allow you to jump to another point in the video programatically.

In windows media, you get 'markers' which you add using the media file
editor. The problem is it depends how you host the file how useful
they are as jump-points into a single video file. If you stick your
files on a web server, then you get pseudo-streaming, it's a form of
long-term file download. It also means that you have to wait till the
video is downloaded up to the marker before you can play it ... and
you can't easily jup backwards again.

If hosted on a media server you can do this jumping about between
markers, but if you had one of those then we'd probably be talking
about server side playlists rather than a cheap and cheerful
javascript solution.

So if you need 'chapter points' you'd better redefine your problem and
post info about the technology you have available.

OK well I posted this solution about a year ago, it should be
adaptable (obviously I won't repost the entire thread here) :

http://groups.google.co.uk/group/microsoft.public.windowsmedia.player.web/browse
_thread/thread/d134164e3d514963/31720a45648e0a4d?lnk=st&q=%22showPlayItems()%22+
author:Neil+author:Smith+author:[MVP+author:Digital+author:Media]&rnum=4&hl=en#3
1720a45648e0a4d

You should read it end to end several times probably, to understand
the implications of what's happening. It's a workable solution which
needs only minor modifcation to meet your stated requirements.

Well my advice really is to make the playlist (dropdown) dynamically
from a database source, using your web server scripting language, so
.NET or PHP or Perl or whatever. It's less chance of failing in a
range of web browsers.

Well I can see what this code is intended to do, but of course it's an
outline, there's no actual makeStream function so you'd have to write
one ;-)

In the code in the thread above, there's a function showPlayItems()
which can be adapted to make a dropdown. First you'd need to have a
form, so let's say

<form name="playlist" id="playlist" onchange="setPlayItem()">
    <select name="playitems" id="playitems">
        <option value="">Please Select</option>
    </select>
</form>

Now you need to adapt the showPlayItems() function from making DOM
elements to creating options in the select element.

Read here if you're unfamiliar with creating options in a dropdown :
http://www.quirksmode.org/js/options.html
http://www.javascriptkit.com/script/cut183.shtml

For example :

function showPlayItems() {
    df=document.forms["playlist"];
//    Get an handle to the select box
    di=df.playitems;
//    Restrict our select to the 1st (blank) option value
    di.length=1;
    playlistItems=WMP9.currentPlaylist.count;
    for (i=0; i<playlistItems; i++) {
//    Add each option text+value in turn from the playlist   
//    Make sure the next line (from di[ ... to ... name, i) is kept
//    on one line for Javascript or you'll get a script error
        di[di.length] = new
Option(WMP9.currentPlaylist.item(i).name, i);
    }
    playListLoaded=true;
    WMP9.controls.stop();
}

Finally, you'd change the setPlayItem function something like this to
use the select element onchange as input instead of the DOM element :

function setPlayItem() {
    df=document.forms["playlist"];
    di=df.playitems;
    index=df.playitems[df.playitems.selectedIndex].value;
    if (index != '') {
        playlistItems=WMP9.currentPlaylist.count;
        if (playlistItems > 0) {

WMP9.controls.currentItem=WMP9.currentPlaylist.item(index);
            WMP9.controls.play();
        }
    }
}

Cheers - Neil

Err I actually meant to post http://tinyurl.com/77sh7 which is easier
to cut & paste ;-)

Cheers - Neil