12244 reading test

I'd like a program to calculate reading speed similar to that on this page: [login to view URL] Practically the window will show a part of text, calculate the time between start and stop and say how many words per minute. The enhancements our program should have on it is that the user will have the possibility to choose which text to read from a database. If text will be bigger than the window we will have a button called "continue" . Clicking it will calculate the speed on the page already shown and show another piece of the same text. At the end the program will calculate the average speed of reading of a longer text.