Assuming the boxes could be of any size, this is an excellent tool to save space on a web page.

Just thinking of an e-commerce site that I saw being worked on where I work at Creare Design, this jQuery would really benefit the entire navigation. Even if it was just to put across some important information over more substantial content, I believe people would, if only for the interest of seeing it work, play with the accordion slider, hence achieving its purpose.

The only issue it might have, purely from just looking at it now and not knowing the exact ins and outs of the coding, is that it may (and I stress MAY) not pass CSS validation tests and/or have problems on cross-browser platforms. Other than that, and if it doesn’t have any issues, it’s an excellent tool, beautifully designed.