var request = new XMLHttpRequest()if(window.XMLHttpRequest){    request = new XMLHttpRequest()}else{    request = new ActiveXObject("Microsoft.XMLHTTP")}request.open('POST','create.php',true)request.setRequestHeader('Content-type','application/x-www-from-urlencoded')request.send('name=王二狗&sex=女')request.onreadystatechange = function(){    if(request.readyState === 4 && request.status ===200){        // do sth    }}