dynamic tour image height

Hi there,
Please, go here: http://tts.bangkokwebagency.co.th/tours/fd-blu-anda-koh-yao-noi/
You will see that there is a big white space under the image. The reason is because we also have some portrait format pictures and the theme sets the height based on the tallest image. Is there a way to change it to the height of the current image shown? The height should be dynamic based on the image shown, not fixed on the tallest image.
Possible?
Thank you.