跨域使用jsonp 获取天气预报
<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>注册</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script type ="text/javascript" src="jquery.js"></script> </head> <body> <script type="text/javascript" src="http://ajax.cdnjs.com/ajax/libs/json2/20110223/json2.js"></script> <div id="content"> </div> <script> $(function(){ $.getJSON("http://query.yahooapis.com/v1/public/yql", { q: "select * from json where url='http://m.weather.com.cn/data/101010100.html'", format: "json" }, function(data) { var $content = $("#content") if (data.query.results) { var result = JSON.stringify(data.query.results); $content.text(result); var obj = eval('('+result+')'); alert(obj.weatherinfo.city); } else { $content.text('no such code: ' + code); } }); }); </script> </body> <script> </script> </html>http://www.webxml.com.cn/WebServices/WeatherWebService.asmx

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