php获取ajax post数据,Ajax POST数据访问PHP页面

var ajax = null;

if(window.XMLHttpRequest){//创建Ajax对象

ajax = new XMLHttpRequest();

}else if(window.ActiveXObject){

ajax = new ActiveXObject("Microsoft.XMLHTTP");

}

if(ajax){//如果创建Ajax对象成功

var url = "login.inc.php";//设置Ajax访问的页面路径

var pStr = "username=root&pwd=root";//需要post的数据用&符号链接起来

ajax.open("POST",url ,true);

ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded");//设置访问的http头

ajax.send(pStr);//提交数据

ajax.onreadystatechange = function(){

if(ajax.readyState == 4 && ajax.status == 200){

alert(ajax.responseText);//弹出php页面的返回信息

}

}

}else{

alert("Create Ajax Fail");return false;

}