ASP.NET Core MVC : when partial view script

Question

In ASP.NET Core MVC, when I used a partial view and add dynamic Javascript event to it using the document.addEvenetListner, the event is not working.

1. Parent View -vWHosiptalGeneralScrning.cshtml

2. Child View -LabInves.cshtml

   I have 2 view 1 is parent view which name is vWHosiptalGeneralScrning and other is child view which code is in below, When i render child view directly the function fn_LabCatChange call properly, When i render through parent view and render child view using ajax call the function fn_LabCatChange not working.