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          <h2>从 JSON 字符串中创建对象</h2>
<p>
  网站名: <span id="name"></span><br> 网站地址: <span id="url"></span><br>
</p>
<script>
  var txt = '{ "sites" : [' +
    '{ "name":"蜜蜂教程" , "url":"www.mifengjc.com" },' +
    '{ "name":"google" , "url":"www.google.com" },' +
    '{ "name":"微博" , "url":"www.weibo.com" } ]}';
  obj = JSON.parse(txt);
  document.getElementById("name").innerHTML = obj.sites[0].name
  document.getElementById("url").innerHTML = obj.sites[0].url
</script>
        