1. Function is Created
   1. Subtopic 1
2. 循环
3. Function Created
   1. Assign [[Scope]] 属性
4. Function Called
   1. create execution context
      1. Create Activation Object
      2. Create Argument Object
      3. Assign Scope
         1. 取出Function Created创建的[[Scope]]值，加上Activation Object
   2. variable instantiation
      1. Using Variable Object . However , The Activation Object is used as Variable Object . They are the same object
      2. The function's formal parameters
      3. Inner function objects
      4. Local variables declared within the function
      5. this keyword