Frame question

Hello everyone,

I have a small question about a frame that I want to ask. I’ve made a little test-site for myself with a small iframe in it. When I click a link, the file appears in the iframe, all good. I’m just wondering: is there a way to get rid of the nasty-looking border of the frame? I tried within the frame tag, and within a css-file, but no luck yet. Is it possible to delete the border?

Thanks in advance.