custom_inputs_lessonfour_part.js

subscribe: function(el, callback) {
    // the jQuery "change" function allows you
    // to notice any change to your input elements
   $(el).on('change.input', function(event) {
     callback(false);
       // When called with false, it will NOT use the rate policy,
	  // so changes will be sent immediately
   }); 
  }