How to know if a jsx script has been launched from Photoshop or from Applescript?

Hello,

Is there a way to know if a jsx script has been launched directly from Photoshop or from an Applescript?

I have a jsx which can be launched by an Applescript or directly from Photoshop and I would like to know if it has been launched directly from Photoshop.

AS

set myJSXFile to "/Volumes/SSD/SOUK/test.jsx"
tell application "Adobe Photoshop CS6" 
   activate
   do javascript of file myJSXFile with arguments {"test1", "test2"}
end tell

JSX

if (arguments !== undefined) {
	alert("Launched from Applescript");
}else{
	alert("undefined arguments: launched from Photoshop."); ///// never executed
}

My problem is that the arguments variable never seems undefined, whether the jsx is launched from Applescript or directly from Photoshop.

Thank you.