In JSP page, inside a javascript function, can I place a java code using scriptlet tag?

Objective: When the user is trying to close a window, I need to check whether a particular list is empty or not. If its not empty, I need to make a hibernate call to do some action.

Did Coding as below: While the user is trying to close a window, I am calling a java script function closeWind() in jsp page.

In a separate java file, in a method checkListValue(), I am doing the logic of checking the list is empty or not, and making a hibernate call if its not empty.

Inside the javascript function closeWind(), I make a call to checkListValue() method using scriptlet tag.

My doubt here is, can I call the method checkListValue() using scriptlet tag inside the javascript function closeWind().

I tried this ,checkListValue() method is not getting called, but the alerts kept inside the java script function gets executed.

Pl help how to fix this issue.

Note: I did import the java file containing checkListValue() method in the jsp page