Welcome to TakeTwo Apps: DHTML Window w/ Auto Center
The days of pop-ups are more or less gone, but you can still get the same effect by using DHTML. This code example will display an auto-centering DHTML window on whatever page you load it. To download this code click here.
For a demo of this script
click here. Be sure to scroll the page to check out the auto-center feature.
Use the below embed code to add this script to your site or blog!