Hello "smedidi"-
Welcome to JavaRanch.
On your way in you may have missed that we have a
policy on screen names here at JavaRanch. Basically, it must consist of a first name, a space, and a last name, and not be obviously fictitious. Since yours does not conform with it, please take a moment to change it, which you can do
right here.
As to your question, what do you have so far? Where are you stuck implementing this?
I'll move the question to the JavaScript forum.