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I feel sorry for IE users (below version 9), but even with "ExplorerCanvas", you won't be able to run this code properly. IE is really slow on displaying map, and even after loading, moving takes too much time to be usable. Below, you may see the toolbar to be used with the Map Object Generator, but all functions are disabled. If you really want to have a look (with "ExplorerCanvas"), you can go to this page : jowe-demo-ie.html Be advise that it will take time, and that dragging the grid will be an awfull experience.
I suggest you to use a modern html5 compliant browser like Chrome, Opera, Firefox, ... You could also take a look at Google Chrome Frame. It is a free plug-in for Internet Explorer. Some advanced web apps use Google Chrome Frame to provide you with additional features and better performance.
Want to know more ? Have a look on the project page