Javascript Puzzle - 2

Courtesy: A Javascript conference video. I forgot the name of the conference. Will update.

var name = 'Mr. Bond';

    (function(){

      if(typeof name === 'undefined'){

          var name = "Mr. Bond";

          sayHello(name);

      } else {

           alert(name);

       }

})();

function sayHello(name){

    alert('hello, ' + typeof name !== 'undefined'? name: 'Mr. Robert!');

}

What this alerts? And, give me the reason for that.