colorbox'/'lightwindow' effect open an additional window when page opens

Hi

I am wanting to have a 'colorbox'/'lightwindow' effect open an additional window on top of my index.html page
I need it to open up when the page opens and not via a click, and it also needs to be central on the page.

It is going to announce a special event.

Hope you can help

So you mean like a popup script? All you would have to do, is set it up and trigger it onload rather than onclick.
A good exmaple is one here

Thank you for replying.
Yes, I did find the code you refer to in your link - many thanks for your help.