I have a main web page that contains an iframe (as in, a box with containing a subsidiary html file). Inside the iframe subsidiary html, there are links. But if you try to click on those link in the iframe, they don't open. You need (I usually use Firefox) to "Open Link in New Tab" to see them. If you click on links in the main web page that aren't in the iframe, they open just fine. How can I set it up so links in an iframe will open directly?