[Typo3] captionSplit + alt-text

[dan frost]

Hello,

Does anyoine know how you get the same effect with alt-text that the 
line below gets for caption text?

tt_content.image.20.captionSplit.token = ,

This results in caption being split by commas - but the alt-text is stil 
l joined up.

E.g.
Image 1 caption = "image 1"
Image 1 alt-text = "image 1,image 2,image 3"
Image 2 caption = "image 2"
Image 2 alt-text = "image 1,image 2,image 3"
...

Any ideas?
dan