Can someone share Javascript code to force links to open in a new browser window?

The link will be ad generated by Javascript code.

Here is a bit more detail about my situation. I am creating a web-based mobile app. In other words, the native app acts just like a set of frames that load web pages. One of the frames loads an ad. The ad is invoked via javascript provided by various mobile ad networks.

On the iPhone, we are noticing the ad loads within the ad frame inside the app, instead of spawning a new browser window. We would like to resolve this w/ javascript code that forces all links (specifically links generated via javascript) to open in a new browser window.

Thanks.