When you're doing Ajax-based validation on a text input control, you really don't want your data calls firing off at every keyup event as this will put unnecessary load on your server. Instead, the thing to do is to wait a little while after the user's last key release to see if she's stopped typing [...]

Introducing Open Country Codes: easy to use ISO 3166 country codes for your apps. Why are some things just much harder than they need to be? Finding a current, easy-to-use data source for populating a country selection box, for example. Most of the clean country data out on the web is second-hand, having at one point [...]