Hi,

On one hand yes, but on the other hand it simply blows up the code.

Oh, I don't think so. See the posting script - only ~20 Lines. Now see the mainpage and count the threads and postings. In every one, you put the javascript code. I think, that will blows up the code.
Another advantage: An external script will be chached by the browser; document.write() not.

Micha