I need a little help for a small code that I use for open a live chat pop up.
Currently the pop up is not opened at the center of the screen.
Can you help me to edit the code to have the pop up always centered?
The code is:
<center>Supporto Live Chat<br><a onclick="window.open('https://google.com/','Live Chat','scrollbars=yes,width=500,height=715');return false;" href="https://google.com"><img class="wp-image-1182 aligncenter" alt="live-butt" src="https://cdn.pixabay.com/photo/2016/06/06/16/39/phone-1439839_960_720.png" width="142" height="75" /></a></center><hr>
And can be tested on: https://htmledit.squarefree.com/
Thank you in advance.