[JS SUI] How to create activated palette?

Hi all.

I want to show palette as activated status.

I tried to set active property. But it is activated for a while and then deactivated again.

Is it possible?

Thanks in advance.

#targetengine session
var win = createWindow();
win.show();
win.onShow = function(){
    win.active = true;
}
function createWindow () {
    var w = new Window ('palette');
    var m = w.add ('statictext');
    m.text = 'Hello, world!';
    return w;
}