// create a function that will greet a person,

// and assign the function to the `greet` variable

var greet = function( person, message ) {

  var greeting = 'Hello, ' + person + '!';

  log( greeting + ' ' + message );

};

​

// use the function to greet Jory, passing in her

// name and the message we want to use

greet( 'Jory', 'Welcome to JavaScript' );

​

// use the function to greet Rebecca, passing in her

// name and a different message

greet( 'Rebecca', 'Thanks for joining us' );