Using Microsoft.XMLDOM in JavaScript and fail loading XML with DTD

[infinitycity]

Hello,

in the following script

--------------- part of the javascript--------------
var logFile = new ActiveXObject("Microsoft.XMLDOM"
logFile.async="false";
logFile.load("log.xml"
var rootE = logFile.documentElement;
----------------------------------------------------

I'm trying to load the log.xml file, which uses the DTD "logEntry.dtd" as shown below:

----------------part of "log.xml"-------------------
<!DOCTYPE logEntry SYSTEM &quot;logEntry.dtd&quot;>
<logFile>
&logEntry;
</logFile>
---------------------------------------------------

As you can see I'm using an entity here which is defined in the DTD.

THE PROBLEM IS: The part &quot;logFile.documentElement;&quot; is null.
javascript has problems to cope with the DTD. Isn't it possible to use DTDs in Microsoft.XMLDOM or is there any other mistake?
When I replace the &logEntry; with normal Elements and remove the DTD-Definition, there is no problem at all.

Tx and Greetings
Sven Eisenhardt
T-Systems, debis-Systemhaus