Won't work on Internet Explorer 8

It doesn't work on Internet Explorer 8.
The following patch from here fixes the issue. In my case applying the patch and recompressing the javascript file didn't work, so I just uploaded the uncompressed version and renamed it.

It is need to replace lines 63 and 64 in uncompressed file:

document.createStyleSheet().addRule("v\\:*", "behavior: url(#default#VML); antialias: true;"); //IE8 chokes on this line.
document.namespaces.add("v", "urn:schemas-microsoft-com:vml");

Replacement:

document.namespaces.add("v", "urn:schemas-microsoft-com:vml");
var style = document.createStyleSheet();
var shapes = ['shape','rect', 'oval', 'circ', 'fill', 'stroke', 'imagedata', 'group','textbox']; 
$.each(shapes,
    function()
    {
        style.addRule('v\\:' + this, "behavior: url(#default#VML); antialias:true");
    }
);

This works for the jquery.maphilight.js but the required file is jquery.maphiligh.min.js. Any idea what needs to be modified in the .min file?

The .min file is a compressed version of the same file. Compressing didn't work for me, so I just renamed jquery.maphilight.js and that works.

Perfect. Thanks

@darioshanghai thanks for posting the fix!

The jquery plugin is what needs to be patched-- the module just has php to create a drupal module that wraps the plugin and exposes the settings. Maybe post over at the plugin's page linked above.

yes works for me too.

Just in case anyone gets stuck;

I had a problem because there are two "jquery.maphilight.min.js", one in "jquery_plugin" folder and another in the "maphilight-1.1.2" folder. I replaced both of them with the "jquery.maphilight.js"(renamed to: jquery.maphilight.min.js) file that I added this patch too and it worked fine.

Not sure if I needed to change both files or just one, or wether this was the best way to do it as it defeats the point of having a compressed version if its just the same as the uncompressed version.

Anyhow I am very greatfull for this patch thank you.

latest jquery map hilight plug in now available here - https://github.com/kemayo/maphilight. I needed to install this for hilights to work on IE 9 with jq_maphilight 6.x.-1.3