HTML5中用AJAX动态加载JSON文件
下面的例子展示了你如何动态加载和解析一个外部的JSON对象，使用了AJAX和HTML5的JSON.parse()方法。<!DOCTYPE HTML><html><head> <title>Simple AJAX .JSON load example</title></head><body> <form> <input id="btn" type="button" value="ajax load" /> </form> <div id="debug"></div> <script type="text/javascript"> function btn_onClickHandler() { ajaxLoad("data.js", ajaxOnResult); } function ajaxLoad(uri, callback) { var request = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP"); request.onreadystatechange = callback; request.open("GET", uri); request.send(null); } function ajaxOnResult(evt) { if ((evt.currentTarget.readyState == 4) && (evt.currentTarget.status == 200 || evt.currentTarget.status == 0)) { var f = document.getElementById("debug"); f.innerHTML = "<h1>HTTP status: "+ evt.currentTarget.status +"</h1>" + "<p>This text should be replaced after JSON.parse() call.</p>"; var json_data = JSON.parse(evt.currentTarget.responseText); f.innerHTML = '<a href="' + json_data.site + '" target="top">' + json_data.name + '</a> -- ' + json_data.properties.description; } } </script> </body></html>
源码下载：
使用Ajax动态加载JSON文件.zip
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