Thanks for your response, but I have to admit it, it does not work the way I would like. This fits the last row of each paragraph, but I would like to fit whole text into the div "taust". Because if I change my browser's window size, the size of the div "taust" changes, but the text size does not change, and breaks out of the div, but I would like the text to fit the div, yet I would not like to stretch my div. So I would like to manipulate the font size in order to fit it in the div. I think it is not possible just using html and/or css, that's why I would like to know, how to use the script you mentioned.
As you can see, text breaks out of the div