"loading" image hangs when navigating to next page

I have a webpage that proceeds (when user clicks 'Next') to a complex server-side operation. Internet Explorer sometimes gives the user the impression that nothing is happening at this stage, so I wa开发者_StackOverflow社区nted to display a "loader" gif and the message "Please wait..." However, the loader gif e.g. http://ajaxload.info stops spinning as soon as Internet Explorer changes its href location giving the users (who are "special") the impression that the website has "hung" and they close the page!

I thought an <iframe> element was what I needed to stop the spinning loader image from "hanging" but it isnt - does anyone have a clue what Im talking about and how I can achieve this?

Very confusing, thanks for your understanding :P

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Check Animated GIF in IE stopping