Placing page of "Thank You" in the center ?

I have iframe on my website, and I'm looking to put a page of " thanks" in the center ..every monitor it is in a different position vertically.

image below to show.

I await a position .

It follows also the address of the site . 

stipesquisa.esy.es

I am looking at your page: stipesquisa.esy.es

Now the issue here is that the body element does not hold the entire height of the page, only the html element does, but even if so it would not be possible to make the thank you page look centered on all sizes and in the same time make sure that the scrollbar is not shown.

The only way to do something like that would be to create some code that checks for this and make sure that it works for different screen sizes the same way which would take some time to buld and test.

As such we would not be able to assist you with the same.

I have iframe on my website, and I'm looking to put a page of " thanks" in the center ..every monitor it is in a different position vertically.

image below to show.

I await a position .

It follows also the address of the site . 

stipesquisa.esy.es

Please do try to apply the code from this link: https://pastebin.com/uVTuNqk7

I made a slight modification to it, that should be able to capture the screen height and set the thank you page at the middle of the same, but please do test it out once you have added it to your website.

To add it simply remove the current <script ... and the code until </script> (including that as well) and replace it with the similar code from the link above.

I have pasted it to PasteBin since it seems that when you have copied the code from the thread last time, it gave you some HTML entities, which corrupted the code (it worked, but not completely). Copying it from there will allow you to do so without any issues.

Do let us know how it goes and please do test it out on the screen resolutions you are after.

I have no words to thank .

I thank to you and your team immensely.

Thank you even for your patience and your willpower

Thanks .. Everything went as I wanted .. If you want to take a look. 

stipesquisa.esy.es

Thank you .

On behalf of my colleague, Bane, you are most welcome. Please feel free to contact us anytime you have questions or concern. Thank you.