新建XMLHttpRequest 对象
if (window.XMLHttpRequest){
var xhr = new XMLHttpRequest();
}else{
var xhr = new ActiveXObject("microsoft.XMLHTTP");
}
发送请求
xhr.open(url);
xhr.send(data);
if (window.XMLHttpRequest){
var xhr = new XMLHttpRequest();
}else{
var xhr = new ActiveXObject("microsoft.XMLHTTP");
}
xhr.open(url);
xhr.send(data);