This past week has seen yet another week of heavy development on the new Singularity web conference site. A lot of what we're doing this year is building infrastructure. Singularity is a new breed of conference and we are doing a lot of work behind the scenes to ensure that we have the solid foundations [...]

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 [...]

EU-based businesses are required to obtain valid VAT numbers from VAT-registered entities. Unfortunately, especially for e-commerce systems, there isn't a simple way to check the validity of a European VAT number. The European Commission provides a web site where you can validate VAT numbers by entering them in an HTML form. This is not [...]

It seems like everyone is getting form validation wrong. Seesmic is a social vlogging app that's built in Flex and is currently in alpha testing. I got invited a few moments ago and went to sign up. On the site, I clicked in the First Name field and started to type. And stopped just as [...]

Flex comes with a built-in form validation system that unfortunately uses mystery meat tooltips to display component validation errors. To see what I mean, take a look at the example I wrote a while back in the Validating Data Quick Start. If you tab around that example, you may notice that you are probably doing [...]