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【 tulaoshi.com - Web开发 】
最近在用ajax开发服务器程序,发现IE浏览器不支持xmlhttprequest对象,而且找不到Microsoft.XMLHTTP控件。
(本文来源于图老师网站,更多请访问http://www.tulaoshi.com/webkaifa/)问题出现了我们需要解决,解决方案如下:
  1、运行下regsvr32 msxml3.dll;
  2、用现成的框架来做ajax;
  3、代码优化:
  if(window.ActiveXObject)
      {
          xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
      }
      else if(window.XMLHttpRequest)
      {
          xmlHttp = new XMLHttpRequest();
      }
      if(handle_s == null)
          handle_s = "bin/normal.py/db";
      this.xmlHttp.onreadystatechange = handle_l;
      this.xmlHttp.open("GET",handle_s,true);
      this.xmlHttp.send(null);
或判断浏览器
  var agt = navigator.userAgent.toLowerCase();
  var is_ie = (agt.indexOf("msie") != -1);
  var is_ie5 = (agt.indexOf("msie 5") != -1);
  var is_opera = (agt.indexOf("opera") != -1);
  var is_mac = (agt.indexOf("mac") != -1);
  var is_gecko = (agt.indexOf("gecko") != -1);
  var is_safari = (agt.indexOf("safari") != -1);
function CreateXmlHttpReq(handler) {
  var xmlhttp = null;
  if (is_ie) {
  // Guaranteed to be ie5 or ie6
  var control = (is_ie5) ? "Microsoft.XMLHTTP" : "Msxml2.XMLHTTP";
  try {
  xmlhttp = new ActiveXObject(control);
  xmlhttp.onreadystatechange = handler;
  } catch (ex) {
  // TODO: better help message
  alert("You need to enable active scripting and activeX controls");
  }
} else {
  // Mozilla
  xmlhttp = new XMLHttpRequest();
  xmlhttp.onload = handler;
  xmlhttp.onerror = handler;
}
  return xmlhttp;
  }
或者
  script language="javascript"
      var http_request = false;
      function send_request(url) {//初始化、指定处理函数、发送请求的函数
          http_request = false;
          //开始初始化XMLHttpRequest对象
          if(window.XMLHttpRequest) { //Mozilla 浏览器
              http_request = new XMLHttpRequest();
              if (http_request.overrideMimeType) {//设置MiME类别
                  http_request.overrideMimeType('text/xml');
              }
          }
          else if (window.ActiveXObject) { // IE浏览器
              try {
                  http_request = new ActiveXObject("Msxml2.XMLHTTP");
              } catch (e) {
                  try {
                      http_request = new ActiveXObject("Microsoft.XMLHTTP");
                  } catch (e) {}
              }
          }
          if (!http_request) { // 异常,创建对象实例失败
              window.alert("不能创建XMLHttpRequest对象实例.");
              return false;
          }
          http_request.onreadystatechange = processRequest;
          // 确定发送请求的方式和URL以及是否同步执行下段代码
          http_request.open("GET", url, true);
          http_request.send(null);
      }
      // 处理返回信息的函数
      function processRequest() {
          if (http_request.readyState == 4) { // 判断对象状态
              if (http_request.status == 200) { // 信息已经成功返回,开始处理信息
                  var returnObj = http_request.responseXML;
                  var xmlobj = http_request.responseXML;
                  var employees = xmlobj.getElementsByTagName("employee");
                  var feedbackStr = "";
                  for(var i=0;iemployees.length;i++) { // 循环读取employees.xml的内容
                      var employee = employees[i];
                      feedbackStr += "员工:" + employee.getAttribute("name");//取得标签指定属性
                      feedbackStr += " 职位:" + employee.getElementsByTagName("job")[0].firstChild.data;//取得指定标签的最初数据
                      feedbackStr += " 工资:" + employee.getElementsByTagName("salary")[0].firstChild.data;
                      feedbackStr +=  "";
                  }
                  alert(feedbackStr);
              } else { //页面不正常
                  alert("您所请求的页面有异常。");
              }
          }
      }
  /script 
  http://www.cnblogs.com/skylaugh/archive/2006/11/20/566164.html
来源:http://www.tulaoshi.com/n/20160219/1624904.html
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