Thanks for the script! The mouseover effect is not exactly what I wanted, but I was able to remove that from the script and get it to do exactly what I wanted. That was to insert one of several random messages, which are not visible until they are highlighted (because they are the same color as the background), into a webpage. I do like having the option of using the mouseover effect later on if I decide to so I really got a bonus!
I do have one question however. Can I make the font size of the messages larger? If I can, how?