[![enter image description here](https://i.stack.imgur.com/5oT5u.png)](https://i.stack.imgur.com/5oT5u.png)
Problem in onchange event Handler. You can see output of this code in second photo. Already 8 time event fired without change any checkbox.
[![enter image description here](https://i.stack.imgur.com/K4IhA.png)](https://i.stack.imgur.com/K4IhA.png)
Out Put of this code is here[![enter image description here](https://i.stack.imgur.com/S9VCl.png)](https://i.stack.imgur.com/S9VCl.png)
When I Used return Function in handler and click on any check box its worked expectedly
?????

[![enter image description here](https://i.stack.imgur.com/cKvGj.png)](https://i.stack.imgur.com/cKvGj.png)
You can see only one time event fired . what is the reason behind it ???