Does anyone know how to post an XMLDOM to a web service using JQuery?

Does anyone know how to post an XMLDOM to a web service using JQuery?

I can retrieve an XMLDOM from a web service in JQuery.  I can post an XMLDOM to a web service using an HTC, but cannot do it with JQuery.  I'm sure someone out there has had this issue before.  I just can't find it.  I can take the outer XML as a string, encode it, and send it that way, but I would really like to keep it as an XMLDOM object.  Thanks.