function ajax(){
var aj=null;
if(window.ActiveXObject){
aj = new ActiveXObject("Microsoft.XMLHTTP");
}else if(window.XMLHttpRequest){
aj = new XMLHttpRequest();
}
aj.onreadystatechange = function(){
if(aj.readyState==4){
if(aj.status==200){
console.log(aj.responseText)
}
}
}
//get 方式提交;
aj.open("get",/文件路径);
aj.send();
//post 方式提交
aj.open("post","/文件路径");
var 变量= “name=”+value,"&psd="+value
aj.setRequestHeader("Content-type","application/x-www-from-urlencoded");
aj.send(变量);
}