/*  此模块测试变量作用域 star */var a ;console.log(a); //undefinedfunction testScope0(){    a = 10;    console.log(a); //10}testScope0();/*  此模块测试变量作用域 end *//*  此模块测试变量作用域 star */ var a = 100; console.log(a); //100function testScope1(){    a = 10;    console.log(a); //10}testScope1();function testScope2(){    var a = 10;    console.log(a); //10}testScope2();function testScope3(){    var a = 10;    console.log(a); //10    console.log(this.a); //100}testScope3();function testScope4(){    a = 10;    console.log(a); //10    console.log(this.a); //100    var a =1000;    console.log(a);//1000}testScope4();/*  此模块测试变量作用域 end *//*  此模块测试变量作用域 star */var a = b = null;var c = 1;(function a(v){    console.log(c); //1    console.log(v); //1 return a = v;})(c) console.log(a); //nullvar a = b = null;var c = 1;function otherScope(c){    console.log(c); //1    a = c;    console.log(a); //1 return a;}otherScope(c);console.log(a); //1/*  此模块测试变量作用域 end *//*  此模块测试变量作用域 star */var name = "window";var obj = {    name:"the obj",    getName:function(){        return this.name    }}console.log(obj.getName()); //the obj/*  此模块测试变量作用域 end *//*  此模块测试变量作用域 star */var name = "window";var obj = {    name:"the obj",    getName:function(){                return function(){                    return this.name;                }            }    }console.log(obj.getName()()); //window/*  此模块测试变量作用域 end *//*  此模块测试变量作用域 star */var a;if(a in window){ console.log("yes"); //yes} if(!(a in window)){    var a = 1;}console.log(a); //undefined/*  此模块测试变量作用域 end */