one single frame, no scrolling

I recently downloaded the latest plugin for Lightbox Plus ColorBox. However something was altered on the website side.

If you go to http://rentxyz.com/apartments-for-rent/texas/keller/ and click on “check availability” you will see that the frame forces the user to scroll down to see the entire frame.

Before I updated to the latest version, the entire image was contained in one single frame. There was not scrolling needed.

How can I revert that back to just one “frame”

Regards,

Andrew

http://ww.wp.xz.cn/extend/plugins/lightbox-plus/