JavaScript结合AJAX_stream实现流式显示

function ajax_stream(url,data,element) {
    var xmlHttp=null;
    if (window.XMLHttpRequest)
      {// code for IE7, Firefox, Opera, etc.
      xmlHttp=new XMLHttpRequest();
      }
    else if (window.ActiveXObject)
      {// code for IE6, IE5
      xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    if (xmlHttp==null)
      {
      alert("Your browser does not support XMLHTTP.");
      element.val('Your browser does not support XMLHTTP. Click the LOG link to monitor the procedure.');
      return 0;
      }
    var xhr = xmlHttp;
    xhr.open('POST', url, true);
    // 如果需要像 HTML 表单那样 POST 数据，请使用 setRequestHeader() 来添加 HTTP 头。然后在 send() 方法中规定您希望发送的数据：
    xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    xhr.send(data);
    var timer;
    timer = window.setInterval(function() {
        if (xhr.readyState == XMLHttpRequest.DONE) {
            window.clearTimeout(timer);
        }
        element.val(xhr.responseText);
    }, 1000);
}

void send();
void send(ArrayBuffer data);
void send(Blob data);
void send(Document data);
void send(DOMString? data);
void send(FormData data);

function ajax_generate_data(jsobj) {
    var i;
    if (window.FormData) {
        var data = new FormData();
        for i in jsobj {
            data.append(i,jsobj[i]);
        }
    } else {
        var data = '';
        var datas = [];
        for i in jsobj {
            // for the values so that possible & contained in the strings do not break the format
            var value = encodeURIComponent(jsobj[i]);
            datas.append(i + '=' + value);
        }
        data = datas.join('&')
    }
    console.log(data);
    return data;
}