Problem refreshing JavaScript

Hi guys, my problem is that everytime I refresh my webbrowser (F5 or ctrl+F5) all my JS scripts are not working anymore…

Here is what I defined in my Java class to integrate JS :

@com.vaadin.annotations.JavaScript(value = { “js/script.js” }) //above of the public class …

JavaScript.getCurrent().execute(“myFunction()”); // I call this JS function from my script.js later in a Java function of this class.

If i don’t refresh everything works perfectly. How can I deal with that please ? Thank you very much for you help.