javascript中的this - Web 开发 / JavaScript

<script type="text/javascript">
  var person = {
  name:"Kevin Yang",
  sayHi:function(){
  alert("你好，我是"+this.name);
  }
  }
  setTimeout(person.sayHi,2000);
</script>

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怎么显示不出来？

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this 指 调用者的对象

setTimeout(person.sayHi,2000);
换成
person.sayHi();

就能正确了。

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你这里 this 指的是 window 对象

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或者 

<script type="text/javascript">
  var person = {
  name:"Kevin Yang",
  sayHi:function(){
  alert("你好，我是"+person .name);
  }
  }
  setTimeout(person.sayHi,2000);
</script>

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楼主没有调用哪个函数，所以没有显示

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<script type="text/javascript">
  var person = {
  name:"Kevin Yang",
  sayHi:function(){
  alert("你好，我是"+this.name);
  }
  }
  setTimeout(function(){person.sayHi()},2000);
</script>

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JScript code:
var person = {
name:"Kevin Yang",
sayHi:function(){
alert("你好，我是"+this.name);
}
}
setTimeout(&