Integrating BIRT reports with XHTML

Hi folks, hope I'm posting in the right place.  I am using BIRT with Orbeon XForms which requires valid XHTML pages.  I tried to use the BIRT JSP tags but the inline JavaScript the tags produce do not validate and hence are unusable for this project.  So I took that generated code and moved it to a JavaScript source file and called just a function from within the XForm.  This function creates an IFrame dynamically and loads the report.  Unfortunately this has gotten very messy due to sizing of the IFrame to fit the report and some other browser dependant issues.  It either looks very ugly or it only sort of works.

Anyone got pointers on how to embed BIRT reports into pages, preferably XHTML ones?  I am constrained because the actual pages will be written by semi-technical people, I am just creating the back end for them, so the implementation can't very complicated-- LoadBirtReport(filename, someparamsgohere) within script tags was acceptable.

Thanks,
-Peter