var name = "John Doe";
function showThis(message) {
  //console.log("name => ", name);
  console.log("this.name => ", this.name);
  console.log("message => ", message);
}
var user = {
  name: "Jane Doe"
};
showThis("hello!", "fuuuu!");
showThis.call(user, "hello again!", "must be ignored");