Question

function google(){
     var kevin = "hello";
     john(kevin);
}

function john(arg){
     var mark = arg;
    function yahoo(mark){
          alert(mark);   
    }

}

Now when i call my function google() why does it not it call the alert in yahoo.

Answer 1

You do not call yahoo. You need to do this:

function john(arg){
     var mark = arg;
    function yahoo(mark){
          alert(mark);   
    }

    yahoo(mark); // <-------
}

You could also refactor you code to do something like this:

function john(arg){
     var mark = arg;

    (function yahoo(){
          alert(mark);   
    })();
}