If your computer resists the larger font / smaller font selections, your browser probably is set to not allow active content.
Here's how to solve this in Internet Explorer:
Tools--Internet Options--Advanced--Security--Check the second box which states, "Allow active content to run on files on my computer."
What you are doing is allowing a text-sizing script to run when you adjust the font.
If there are other viewing problems, please send me an email.
Paul Paquin