Link on z-indexed div not a link?

I have a div behind the main div. Sometimes it appears and sometimes it's occluded, and that's fine. But the link on that z-indexed div isn't showing up as a link. Which is to say, the browser doesn't turn the cursor to a pointer; and when you click on it, it doesn't request the href d开发者_运维问答ocument.

Is there any way to keep the div so that it gets occluded when the browser is resized, but still gives us the link?

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OK, I found the problem.

I was using negative z-index values, which puts the div behind the body and is therefore unreachable. When I used the same relative values for main div and background div, but made them positive, it all worked.

Hope this helps someone else.