centering a scrip widget

I’m sorry but it is really beyond the scope of these forums to deal with general CSS issues. Try a dedicated CSS resource such as https://www.css-discuss.org/ instead. In the meantime, using Firefox with the Firebug add-on for this kind of CSS work. Or use whatever developer tool is available in your web browser.
https://getfirebug.com/

i have tried every css trick in the book and can’t get it to work. i use firebug and nothing works.

Try a dedicated CSS resource such as https://www.css-discuss.org/ instead.