How to make popup windows focus

[wxdqz]

Hi,

I'm having trouble making a pop up window the focus once it has been created. The code to create the window is as follows

internal=window.open("../internal/template.html","internalWin","");
internal.focus();

The window creates fine but then it moves to the back and the parent remains the focus. I tried using internal.window.focus() with no luck either

thanks in advance
pug