I want to have a link in the popup.html file for my extension that loads another file (which will be included with the extension) how can I do this? or will I need to keep it in the same page?

I tried using this code:

<a href="/mail.html">
    <img id="newmail_icon" src="" width="16" height="16" />
    <span id="newmail">loading</span><br />
</a>

But when I click the link nothing happens.

I just found out that adding target="_blank" to the link will make it work and open in a new tab, but I can't get it to open in the popup. I have tried target="_self" but it didn't do anything.