Putting a border on a polygon image map?

I was wondering if it were possible to but a border on 开发者_运维知识库an image map? The only answers I've found are related to putting a border on images.

The polygon I'm using is a skewed square.

Also, any suggestions as to any alternative methods to using image maps (excluding flash)?

Thanks!

I don't think it can be done using CSS alone, but there are JavaScript solutions. For example, the jQuery Map Hilight Plugin works very nicely. Examples:

• The United States of America
• Demo of most features