The iframe with terms & regulations doesn't show u

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.5
-- Browser(s) name and version -- : not relevant
-- Error-message(debug-mod must be tuned on) -- : not relevant

Hi,

I have a strange problem.
Terms & regulations suddenly stopped working. What I mean suddenly is that the other copy works OK (from 3-4 days ago, after that some development was done but not in the area of this T&R).

So, I have an article set, inside text. I click on the link, a popup shows but it only has the h3 and the X to close.
Inside there is no iframe - I see this iframe with the actual article on this working copy.
Unfortunately, the working copy is older and we can't copy it back.

Any idea why iframe is not shown?
Everything else like firewall, TinyMCE, Joomla options are exactly the same.
I just styled a bit and that's all. What's more - these styles are the same on both sites.

EDIT:
I know. The text for terms and regulations doesn't show up when I choose the other type of showing login options.
I mean I change to radio button list with options: "log in", "register" and "buy without registration".
I styled it a bit (look here: dev.alg.net.pl/sklep/checkout - sorry it's in Polish : / I'm adding screenshots.

Hello,

(from 3-4 days ago, after that some development was done but not in the area of this T&R).

What do you mean by wthout my development?
I deleted custom.css from hikashop specific stuff - the same.

When I have this type of listing - the iframe in the popup doesn't show.

I am able to see it both on the older edition and the newer edition.

I don't know - how do you check the type of popup? It's the default one from Joomla and Hikashop, I guess? Don't know what you are asking about.

That did the trick. Mootools.
Thank you.