Orange box around links

Recently orange boxes started appearing around links on my page and I don't know why.

I didn't do anything to make that happen and I can't find anything in the CSS indicating that that should be happening.

On my homepage: http://ultimatemmo.webege.com/index.html notice how when you click on the links in the site navigation bar or the links on top, there's an orange box around them when you开发者_JAVA百科 click on them.

This happens on some pages but not others, and some links but not others.

Can anyone think of a reason for this? Has anyone else had this problem?

I couldn't find anything on this site or on google about it.

Edit: I also just checked the links using Chrome Developer Tools and I couldn't find any style rules indication why this is happening

---

Add outline: none; to your a rule:

a {
    ...
    outline: none;
}