How is this site opening a new window

Normally we can specify a target in the link or use javascript window.open to open开发者_Go百科 a new window.

But when I access this site

www.wenxuecity.com (It is a chinese site)

I could't find out how it opens each news in a new window.

no target in the link. debug javascript doesn't show any call to window.open

Could someone tell me how it is implemented?

Thanks

---

It has this code in the head section:

<base target="_blank">

That sets the default target for all links on the page.