communication from two webengine

[elicat]

Hi, I'm working with a QT-QML-WEBENGINE project.
When I open a QML file connecting a webengine object I can interact with QT / C ++ with the SLOT and SIGNAL system.
Through the onNewViewRequested event, started with window.open, I can act in a QML position through "Connections {target:".
Everything ok but ...
I have not found a way to get back to the control of the webengine.

Example:
in 2 qml files I connect webengine and in each one I load a html page controlled by specific javascript.
main.qml
     tabslipt
         primo.qml (component of main.qml)
             - pageA.html
                - javascript_pageA.js
         secondo.qml (component of main.qml)
             - pageB.html
                - javascript_pageB.js

If I'm on pageB I would like to start a function in javascript_pageA.js
If I'm on pageA I would like to start a function in javascript_pagieB.js

Is it possible according to you?
Thanks in advance