In the mentioned project the LoadingPanel is shown always in the center of the visible area of the page. However, if you resize the page after the loading panel is already displayed, its position won't be changed. This is true because we are taking the scrollable height and width in the OnAjaxRequest event which is triggered right before the LoadingPanel is shown.
So if you want to change the position of the loading panel after the Ajax request had started you need to hook the onresize event of the browser window and in its body to recalculate the position of the LoadingPanel. You could use the code from this
help topic to show/hide it explicitly. More information about the onresize event could be found on this
If you had something different in mind, please elaborate a bit more about it, or paste the code if you have problems with specific implementation.
All the best,
the Telerik team
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