//创建Ajax对象(兼容处理)
function createXHR() {
var xhr = null;
if(window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
} else if(window.ActiveXObject) {
xhr = new ActiveXObject(\'Microsoft.XMLHTTP\');
}
return xhr;
}
//发送post请求
function request(){
var xhr = createXHR();
xhr.open(\'POST\',\'checkRequire.php\',true);
xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//post请求必须加上这行,get请求不需要
xhr.onreadystatechange = function() {
if(this.readyState == 4 && this.status==200) {
alert(this.responseTex);//返回的数据,并处理
}
}
xhr.send(\'name=tom&age=20\'); //发送请求数据,get请求xhr.send(null);
}