Lordeagle Waplocus Javascripts slows down page load, why not use xt random include? Am not with the function code by heart, but google will get you there if u search with the bold phrase above or surf http://tutorial.graham.yn.lt .
If u must use javascript learn to always end every javascript statement with a semicolon ;, and make sure that the string contained in the files that u wanna include has no single quot ' in it.