What's with this thing?

It's somewhat better and more workable: the initial fixed height seems to be gone.

But height adjustments are made in a weird way: if the box is full of text, every time I press a key on the keyboard the box's height changes. Increases by one line, decreases by one line, increases by one line, etc.

And the box is not attached to the bottom of the pop-up window, so increasing the window's size just adds empty space at the bottom. I mention this again because it would sort it all out, but if it's not feasible so be it.

It's not easy to do that with JavaScript. I'm sorry but I don't have access to IE7 so I can't test everything with it. IE 7 or older accounts about 1% of all browsers here.