post
function createXHR() {
if (typeof XMLHttpRequest != 'undefined') {
return new XMLHttpRequest();
} else if (typeof ActiveXObject != 'undefined') {
var version = [
'MSXML2.XMLHttp.6.0',
'MSXML2.XMLHttp.3.0',
'MSXML2.XMLHttp'
];
for (var i = 0; version.length; i ++) {
try {
return new ActiveXObject(version[i]);
} catch (e) {
//跳过
}
}
} else {
throw new Error('您的系统或浏览器不支持XHR对象！');
}
}
/*
//POST请求
addEvent(document, 'click', function () {
var xhr = createXHR();
var url = 'demo.php?rand=' + Math.random();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
if (xhr.status == 200) {
alert(xhr.responseText);
} else {
alert('获取数据错误！错误代号：' + xhr.status + '，错误信息：' + xhr.statusText);
}
}
};
xhr.open('post', url, true); //第一步改为post
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); //第三步，模拟表单提交
xhr.send('name=Lee&age=100'); //第二步将名值对放入send方法里
});
*/封装AJax
function createXHR() {
if (typeof XMLHttpRequest != 'undefined') {
return new XMLHttpRequest();
} else if (typeof ActiveXObject != 'undefined') {
var version = [
'MSXML2.XMLHttp.6.0',
'MSXML2.XMLHttp.3.0',
'MSXML2.XMLHttp'
];
for (var i = 0; version.length; i ++) {
try {
return new ActiveXObject(version[i]);
} catch (e) {
//跳过
}
}
} else {
throw new Error('您的系统或浏览器不支持XHR对象！');
}
}