Click-trough TextAreas?

Im doing this chat-game, where youre a little avatar and you click on floor-tiles to move.

Well, due to restriction of space, a part of my chatwindow (which is made of a TextArea-component) covers some of the tiles, making them unclickable.

Since the TextArea is half transparent, I would still like to be able to klick trough the TextArea and onto the tiles in the back. Is that possible somehow? Ive tried :

myTextArea.selectable = false;

…but that doesnt do the trick.