原生ajax封装,包含post、method方式
原生ajax封装,包含post、method方式function ajax(method, url, data, success) {var xhr = null;try {xhr = new XMLHttpRequest();} catch (e) {xhr = new ActiveXObject('Microsoft.XMLHTTP');}//get时,且数据存在,URL需要用?连接if (method == 'get' && data) {url += '?' + data;}xhr.open(method,url,true);if (method == 'get') {xhr.send();//get,发送时空的} else {xhr.setRequestHeader('content-type', 'application/x-www-form-urlencoded');//设置请求头xhr.send(data);//发送里,放数据}xhr.onreadystatechange = function() {if ( xhr.readyState == 4 ) {if ( xhr.status == 200 ) {success && success(xhr.responseText);} else {alert('出错了,Err:' + xhr.status);}}}}