End Google Ads 201810 - BS.net 01 --> Hi everybody!

ok, I desperately need to make such thing:

There's a website, that have a form (with post method) and have 2 input fields. After a press of a button, on next page a table is generated, and it fills with numbers using ajax. So at the start table cells have this rotating gif "saying" that data is being collected, and after some time numbers appears.

So my question is how to get the source of the page AFTER all ajax events is being finished?

I have tried to use this method, and I had some strange results - one day it worked, next day it won't.

So, maybe there's another examples?

Thanks!