This points to the problem-strict, non-strict mode, event handler

The this value depends on where it is called with methods   function calls: ES3 and non-strict es5,this point to the Global object, ES5 Strict mode for undefined  method invocation: This points to the object that called it.  function IsStrict () {return!this;} Determine whether the strict mode  this value points to the special case: var name= "window";                          ,         &NB Sp    obj.getname ();        //myobjvar obj={                      and nbsp                          ,         &NB SP; (obj.getname) ();    //myobj            Name: "MYOBJ",            GETN Ame:function () {                              (o) Bj.getname=obj.getname) ();    //Window                Console.log (this.name);      & NBsp    }       };  ie event handlers, this points to global scope event handlers and IE DOM0-level methods, This points to the bound object (Currenttarget)

This points to the problem-strict, non-strict mode, event handler