Restarted browser, then PC, then tested once more on Chrome, Vivaldi - no success, on Firefox, Edge - success

That means, that the problem sits not in my app but in browsers. But I really don't know how to make my catalogue work for everyone and without issues on various browsers

But all this was done for using my catalogue via iFrame.
I added this code into my html page http://nechsapaci.info/katalogy/knihy.html - and it doesn't work again !!!

Code: Select all
<iframe
style="width:1600px;height:900px;border-style:none"
src="http://katalog.jecool.net/index.php?u=hocikto&p=4321&f=61f99555e7196f6">
</iframe>