<!DOCTYPE html>charset="utf-8"W3Cschool教程(w3cschool.cn)点击下面的按钮,循环遍历对象 "person" 的属性。onclick="myFunction()"点击这里id="demo"function myFunction(){var x;var txt="";var person={fname:"Bill",lname:"Gates",age:56};for (x in person){txt=txt + person[x];}document.getElementById("demo").innerHTML=txt;}