You would need to lose the HTML page in the Web browser control, and then you would need to code your PowerScript to listen for the event clicks and launch the URL in another PB window.  Basically, JavaScript cannot directly control PB you need your PowerScript to do this.  I don't have exact example to give you, but you can look at this demo app to get some ideas how PowerScript can be integrated with JavaScript.  https://github.com/Appeon/PowerBuilder-Graph-Example

Hi, Michael -

Because the underlying browser engine has recently changed in PowerBuilder, would you please provide the version, release, and build of PB that you are using (which is ALWAYS a good idea whenever you ask any question)?

Thanks!  John