You can not do what you are asking. I replied to one of the many other posts you have made on the forum on the subject so how about you let it lie with this thread?
The reason you cannot do this is because it would be an incredible security flaw in the chromium software that node-webkit uses.
Edit:
You can include and run a bat file by using the node-webkit object though. scirra.com/manual/162/node-webkit