Thanks to Robert Anderson (Feature Request ID: 2698921) you can now add attributes to the body tag in HTML output.

I wanted to use the http://code.google.com/p/google-code-prettify/ code highlighter and was able to get the script calls in using args.hdf/hdr, and use outputclass=prettyprint into the codeblock tag. The last thing was to modify the body tag to run the script when the page loaded. I modified the XSL to make it conditional, so it didn't modify the tag on pages that didn't actually need the script:

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