WordPress Deleting HTML Code

Hi, I’m having a bit of a problem with WordPress deleting HTML code. I want to create an imagemap and I’ve got the code to do this. It works in a normal browser, but when I put it into WordPress it deletes all of the imagemap code whenever I press “save” or “publish” and just posts it as a standard image.

I’ve tried only using the HTML view. I’ve tried disabling the “visual view” in my profile. I’ve tried pressing “publish” without saving first. None of this works. I’ve even tried taking the code from a previous imagemap that exists on the blog I use (that someone else added a long time ago) pasting that into wordpress and it still deletes the code. The problem is not with the visual editor or the code itself, so I’m clueless as to how to actually post it.

If anyone has any ideas of a workaround that would be great. Thanks!