I'd like to tip you of Juicy Studio's styleswitcher: http://juicystudio.com/index.php - click on the Switch to High Contrast-link in the menu. This also works without any scripts, as it's using PHP with cookies (I presume) to check for user-style-setting.
You could use something like that where the user could click to get different text-sizes (through different stylesheets). A List Apart also has an old article about creating your own style switcher.
an example of this technique is shown there.
Al
You could use something like that where the user could click to get different text-sizes (through different stylesheets). A List Apart also has an old article about creating your own style switcher.