Top 21 Techblog

facebook like button hack

I was wondering how they do it. You come to a website like www.web-burner.de/junge, you think its a simple video player and click the play button. Suddenly you have clicked an invisible facebook like button! How can this happen? The facebook Like-Button is an iFrame. It is pretty difficult these days to hack an iFrame and change its content to look like an video player.

After I had a look in the source code of the side, I recognized its acctually a pretty simple and effective hack. Nice idea, even if its not really "likable"!

Maintaining sessions with ajax polling and servlets

Depending on the amount of concurrent users (and therefore numbers of sessions) and the usage of session data your web application might require lots of server resources during the lifetime of a session. Therefore it´s a good advice to set the session lifetime to an agreeable short value. However web applications might require longer session lifetimes. Just think of a blog system where you might edit articles without server-interaction and you want the session to be still alive when posting your changes to the server after some minutes.

This article shows an approch for keeping the session lifetime short in general but allow longer session lifetimes if needed for usability reasons.

dynaWidgets 1.2.1 final release is out!

Finally there´s a new release of our DynaWidgets JS F components out - Version 1.2.1. This one brings new major features as well as some minor extensions.

sellaround.net beta is now online!

Sellaround makes it possible for individual products to be sold via so-called social selling widgets. It´s a completly new way of selling stuff by using social channels like blogs, facebook, twitter or your favorite mobile.

Create and share mockups online with Tiggr

Tiggr is an application for creating user interface mockups collaboratively online. It focuses on creating mockups for rich web application development.