

需掌握的技能点:
jsonp、跨域相关等。
以下两种代码,均可直接运行。
1、使用原生JS:
<!DOCTYPE html><html lang="en"><head>
 <meta charset="UTF-8">
 <title>Title</title></head><body>
 <p id="cur_year"></p>
 <p id="iciba_ds"></p></body></html><script type="text/javascript">
 document.getElementById("cur_year").innerHTML =new Date(); function data(data){ //遍历
 var description = ""; for(var i in data.result){ var property=data.result[i];
 description+=i+" = "+property+"<br />";
 }
 document.write(description);
 }</script><script type="text/javascript" src="http://api.k780.com:88/?app=weather.today&weaid=412&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json&jsoncallback=data"></script>2、使用jquery:
<!DOCTYPE html><html lang="en"><head>
 <meta charset="UTF-8">
 <title>Title</title>
 <script type="text/javascript" src="jquery-3.3.1.min.js"></script>
 <script>
 $(document).ready(function(){
 $.ajax({
 type : 'get',
 async : false,
 url : 'http://api.k780.com/?app=weather.today&weaid=412&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json&jsoncallback=data',
 dataType : 'jsonp',
 jsonp : 'callback',
 jsonpCallback : 'data',
 success : function(data){ if(data.success!='1'){
 alert(data.msgid+' '+data.msg);
 exit;
 } //遍历
 var description = ""; for(var i in data.result){ var property=data.result[i];
 description+=i+" = "+property+"<br />";
 }
 document.write(description);
 },
 error:function(){
 alert('fail');
 }
 });
 }); </script></head><body></body></html>