Easy Stylesheet switch allows you to switch any numbers of css stylesheets on fly. You can offer to your visitor diferent version of your page by this.

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Get the id of an auto_incrementing id from a mysql insert
Remove all characters except letters and numbers from a string
Check that characters in a variable are alpha numeric using ereg
Add numbers to MySQL database results
Optimize All Tables In A MySQL Database
Display a different image for each day of the week
Random image
Directory lister