Site onload effects

Do you guys remember thoose effect pages used to have a few years ago? It loaded the page, and when it was loaded when a white page with black text printed out "Loading site...". Then the left side of the white background was slided to the left, and the right to the right. And behind them was the read page.

I need to find a javascript like that, I want it for an admin-section on a site. Do you have a script like that, can write me one, or maybe point me in the right direction, I've google for days but still can't find anything.

Thanks in advance.

I am not exactly sure what you are talking about but it sounds like an AJAX or DIV with dynamic content option to me. Have any sites that you can show as examples?