Create Load Window in Web Application

Question

Hi,


I have a URL that runs some server-side code and spits out some html code. I want to have an HTML page, where I click on "refresh" and the server-side code URL is loaded, and then printed inside a window in the HTML page (or updates some etc without having to reload the tab/page in the browser. While it is loading the URL, I would like an animation of a "loading" icon to appear just like in a flash app in the middle of the frame where the text is supposed to appear.


Thanks