title: Magento Custom Payment Plugin : How to add a Hook on PLACE ORDER?
body: <p>I'm trying to make a custom payment plugin for Magento.
  My new Payment method is showing in Payment Information on Checkout page.</p>
  
  <p>Now what I want is that when Place Order is pressed, I want to trigger a JS code ...</p>
  
  <p>Any ideas about it ?</p>
  
  <p>Thanks</p>