Did I get you with the title? That’s right, it’s not possible to securely validate a form with Javascript. That is, you can’t prevent invalid data from being submitted to the server by using Javascript for validation. We’ve all seen Javascript-based form validation classes (and classes for Javascript libraries like Mootools, which is my favourite, so I’ll be making reference to it here), but it’s all too often not made clear enough to those who might use such classes that javascript validation alone provides no security against invalid data being sent to your back-end processing script and making it into your database.
June 5, 2009
May 1, 2009
Getting Time Zone from Latitude & Longitude
The problem:
I was recently tasked with building an application that relied heavily on accurate time zone conversions. I, like many people I soon found out, thought there were just a handful of timezones and the usual select list would suffice: