Center Align a Pop-up Window

I’ve been intending to write some JavaScript to center align a pop-up window to use in one in every of my apps. i used to be progressing to do that mistreatment the screen a part of the DOM. when googleing it for two seconds, there was no ought to. I found this awful JavaScript pop-up code generator that mechanically generates your JavaScript code with with of these ex gratia parameters that you'll specify.

Defiantly makes it abundant easier than writing it from scratch.