Most Loading or Progress control dont allow you to change anything else on tha page. It would be great for someone to finally develope a control that when a button is clicked a loading message is shown over the page like a modal dialog box and then allows the server-side code to do what ever to the page like change the menu or change the URl in a frame etc and then when finished hide the loading indicator. There are too many issues with callback panels not beable to update other controls unless they are in the callback panel as well. which makes everything harder