var global = 5;
function first(param) {
  global += 10;
  alert(param + " method shows global to be " + global);
}

Pass "first" to this function and see that you get the expected alert box with the global variable incrementing by 10. The second way to define a function is the anonymous way. You define a function inline, without giving it a name:

second = function(param) {
   global += 10; 
   alert(param + " method shows global to be " + global)
};

Pass "second" to this function and see that you get the expected alert box, with the global variable incrementing by 10. The third way to define a function is by constructing it with the Function function. The Function function accepts two parameters: the parameter to be passed, and the body of the function:

third = new Function(
   "param", 
   " global += 10; alert(param + ' method shows global to be ' + global)");

Pass "third" to this function and see that you get the expected alert box, showing global incrementing by 10 with each click.

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