摘要：
1 var url = "/data.php"; 2 var param = [ 3 'id=9898', 4 'limit=20' 5 ]; 6 7 var req = new XMLHttpRequest(); 8 9 req.onreadystatechange = function(){10 if(req.readyState == 4){11 var responseHeaders = req.getAllResponseHeaders(); // 获取响应头信息12 ... 阅读全文