源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> </head> <body> <p>使用中括号([])来修改 JSON 对象的值。</p> <p id="demo"></p> <script> var myObj, i, x = ""; myObj = { "name":"runoob", "alexa":10000, "sites": { "site1":"www.ossoft.cn", "site2":"m.ossoft.cn", "site3":"c.ossoft.cn" } } myObj.sites["site1"] = "www.google.com"; for (i in myObj.sites) { x += myObj.sites[i] + "<br>"; } document.getElementById("demo").innerHTML = x; </script> </body> </html>
运行结果