Very customizable, allows webmasters to educate their user base on which browser version or type to use.

Here are some key features of "BrowserUpdateWarning":

· Set the minimum version per browser type
· Set custom upgrade links per browser type
· Set which browsers appear in the warning
· Show as a popup
· Allow the user to continue to the page or not
· Add shades and opacity to the window

Requirements:

· JavaScript enabled on client side
· MooTools 1.4.4 or higher