Hey all,
i hope someone of you can help me with the following questions. 

Is it possible to fetch the entered text of a user e.g. every 30 chars and with this i like to visualize content in a dynamic information box, such here http://en.wikipedia.org/w/index.php?title=Java&action=edit

Example: The user entered a text over 30 chars for a new created page by him.. 

After that, the infobox shows up something like this: 
You entered: 

"Java (Indonesian: Jawa) is an island of Indonesia and the site of its capital city, Jakarta. Once the centre of powerful Hindu-Buddhist kingdoms, Islamic sultanates, and the core of the colonial Dutch East Indies"

This is very similar to the Article Java_Platform,_Standard_Edition .

What the info box will display doesn't matter. First of all i need to get entered text, every time when new 30 chars where entered by the user. Second, i want to display some information.

Is this possible? Any hints? Examples?

I hope you can help me! Thx in advance