ajax 之js读取xml的多浏览器兼容

主要是分为两大类：IE、其它浏览器

IE8以下只支持这种

InputVoltage.innerText = xmlDoc.getElementsByTagName(id)[0].text,

其它浏览器大部分兼容这种

InputVoltage.innerHTML =xmlDoc.getElementsByTagName(id)[0].textContent。

部分代码如下：

 function Gett(str)
 {

   // 判断MyBrowserType，以决定读取text还textcontent。
   var browsertype= checkBrowser();
    var url="curr_run_xml.php";
          // code for IE7+, Firefox, Chrome, Opera, Safari
           try{

          xmlHttp=new XMLHttpRequest();
          xmlHttp.onreadystatechange=function()
          {
              if (xmlHttp.readyState==4 && xmlHttp.status==200)
              {

                     xmlDoc=xmlHttp.responseXML;
                     InputVoltage.innerHTML =  GetXmlTextByTagName(xmlDoc,"input_vol_a")
                     OutputVoltage.innerHTML = GetXmlTextByTagName(xmlDoc,"output_vol_a");
                     OutputMinVoltage.innerHTML = GetXmlTextByTagName(xmlDoc, "output_min_vol");
                     OutputMaxVoltage.innerHTML = GetXmlTextByTagName(xmlDoc, "output_max_vol");
                     Frequency.innerHTML = GetXmlTextByTagName(xmlDoc, "input_fre");
                     CurrentLoad.innerHTML = GetXmlTextByTagName(xmlDoc, "output_load_a");

                       <?php 

                         if(isset($rs))
                         {
                            foreach ($rs as $key => $value)
                            {
                               echo  $value['dp_paramname'].".innerHTML=GetXmlTextByTagName(xmlDoc,'".$value['dp_paramname']."');\r\n";
                            }
                         }

                         for($i=0;$i<count($resultHT);$i++)
                         {
                             $humidityVar = "td_humidity".$i;
                             $temperatureVar = "td_temperature".$i;
                             $ht_offline = "td_offline".$i;
                             echo  $ht_offline.".innerHTML=GetXmlTextByTagName(xmlDoc,'".$ht_offline."');\r\n";
                             echo  $humidityVar.".innerHTML=GetXmlTextByTagName(xmlDoc,'".$humidityVar."');\r\n";
                             echo  $temperatureVar.".innerHTML=GetXmlTextByTagName(xmlDoc,'".$temperatureVar."');\r\n";
                         }

                       ?>

                     BatteryVoltage.innerHTML = GetXmlTextByTagName(xmlDoc,"batt_total_vol");
                     BatteryContent.innerHTML = GetXmlTextByTagName(xmlDoc,"batt_cap");
                     UPSCTemperature.innerHTML = GetXmlTextByTagName(xmlDoc,"ups_temp");
                       tfvar = GetXmlTextByTagName(xmlDoc,"ups_temp");
                       fTemp = parseFloat(tfvar);
                       fTemp = (fTemp*9)/5+32;
                       tfnum = fTemp.toFixed(2);
                     UPSFTemperature.innerHTML=tfnum.toString();

                      state1 = GetXmlTextByTagName(xmlDoc,"ws_value7");
                      state2 = GetXmlTextByTagName(xmlDoc,"ws_value4");
                      state3 = GetXmlTextByTagName(xmlDoc,"ws_value6");
                      state4 = GetXmlTextByTagName(xmlDoc,"ws_value5");
                      state5 = GetXmlTextByTagName(xmlDoc,"ws_value0");
                      state6 = GetXmlTextByTagName(xmlDoc,"ws_value1");
                      state7 = GetXmlTextByTagName(xmlDoc,"ws_value3");
                      state8 = GetXmlTextByTagName(xmlDoc,"ws_value2");

                     changeImage();
                     changeWord();
              }
            }
            xmlHttp.open("GET",url,false);
            xmlHttp.send(null);
          }
          catch (e)
           {

                       xmlHttp = -1;
                       var XmlHttpVersions = new Array("Microsoft.XMLDOM,MSXML2.XMLHTTP.6.0", "MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP","Microsoft.XMLHTTP","MSXML4.DOMDocument", "MSXML3.DOMDocument", "MSXML2.DOMDocument", "MSXML.DOMDocument");
                       for (var i = 0; i < XmlHttpVersions.length ; i++)
                       {
                         try {
                               if(xmlHttp = new ActiveXObject(XmlHttpVersions[i]))
                               {

                               break;
                               }

                          }
                       catch (e)
                        {
                          continue;
                        }
                   }

           if (!xmlHttp)  alert("获取浏览器xml控件失败");

            xmlHttp.onreadystatechange=function()
               {
                 if (xmlHttp.readyState==4  && xmlHttp.status==200)
                     {  

                         xmlDoc=xmlHttp.responseXML;
                         InputVoltage.innerText =  GetXmlTextByTagName(xmlDoc,"input_vol_a")
                         OutputVoltage.innerText = GetXmlTextByTagName(xmlDoc,"output_vol_a");
                         OutputMinVoltage.innerText = GetXmlTextByTagName(xmlDoc, "output_min_vol");
                         OutputMaxVoltage.innerText = GetXmlTextByTagName(xmlDoc, "output_max_vol");
                         Frequency.innerText = GetXmlTextByTagName(xmlDoc, "input_fre");
                         CurrentLoad.innerText = GetXmlTextByTagName(xmlDoc, "output_load_a");

                           <?php 

                             if(isset($rs))
                             {
                                foreach ($rs as $key => $value)
                                {
                                   echo  $value['dp_paramname'].".innerText=GetXmlTextByTagName(xmlDoc,'".$value['dp_paramname']."');\r\n";
                                }
                             }

                             for($i=0;$i<count($resultHT);$i++)
                             {
                                 $humidityVar = "td_humidity".$i;
                                 $temperatureVar = "td_temperature".$i;
                                 echo  $humidityVar.".innerText=GetXmlTextByTagName(xmlDoc,'".$humidityVar."');\r\n";
                                 echo  $temperatureVar.".innerText=GetXmlTextByTagName(xmlDoc,'".$temperatureVar."');\r\n";
                             }

                           ?>

                         BatteryVoltage.innerText = GetXmlTextByTagName(xmlDoc,"batt_total_vol");
                         BatteryContent.innerText = GetXmlTextByTagName(xmlDoc,"batt_cap");
                         UPSCTemperature.innerText = GetXmlTextByTagName(xmlDoc,"ups_temp");
                           tfvar = GetXmlTextByTagName(xmlDoc,"ups_temp");
                           fTemp = parseFloat(tfvar);
                           fTemp = (fTemp*9)/5+32;
                           tfnum = fTemp.toFixed(2);
                         UPSFTemperature.innerText=tfnum.toString();

                          state1 = GetXmlTextByTagName(xmlDoc,"ws_value7");
                          state2 = GetXmlTextByTagName(xmlDoc,"ws_value4");
                          state3 = GetXmlTextByTagName(xmlDoc,"ws_value6");
                          state4 = GetXmlTextByTagName(xmlDoc,"ws_value5");
                          state5 = GetXmlTextByTagName(xmlDoc,"ws_value0");
                          state6 = GetXmlTextByTagName(xmlDoc,"ws_value1");
                          state7 = GetXmlTextByTagName(xmlDoc,"ws_value3");
                          state8 = GetXmlTextByTagName(xmlDoc,"ws_value2");

                         changeImage();
                         changeWord();   

                         xmlHttp = null;
                     }
               }  

              xmlHttp.open("GET",url,false);
              xmlHttp.send(null);  

       }

         setTimeout("Gett()",time_inteval);
 }    

 function check(reg) {
     var ug = navigator.userAgent.toLowerCase();
     return reg.test(ug);
  }

  function checkBrowser()
  {
       var ug = navigator.userAgent.toLowerCase();
     //  var userAgent = document.getElementById("userAgent");
     //  userAgent.innerHTML = "浏览器的用户代理报头：" + ug;

         //alert("浏览器的用户代理报头：" + ug);

       var browserType = "";
       var ver = "";

       //检测IE及版本
       var IE = ug.match(/msie\s*\d\.\d/); //提取浏览器类型及版本信息，注match()方法返回的是数组而不是字符串
       var isIE = check(/msie/);
       if(isIE) {
        browserType = "Internet Explorer";
        ver = IE.join(" ").match(/[0-9]/g).join("."); //先用join()方法转化为字符串，然后用match()方法匹配到版本信息，再用join()方法转化为字符串

        MyBrowserType=1;
       }

       //检测chrome及版本
       var chrome = ug.match(/chrome\/\d\.\d/gi);
       var isChrome = check(/chrome/);
       if(isChrome) {
        browserType = "Chrome";
        //ver = chrome.join(" ").match(/[0-9]/g).join(".");
        MyBrowserType=2;

       }

       //检测firefox及版本
       var firefox = ug.match(/firefox\/\d\.\d/gi);
       var isFirefox = check(/firefox/);
       if(isFirefox) {
        browserType = "Firefox";
        ver = firefox.join(" ").match(/[0-9]/g).join(".");
        MyBrowserType=3;
   }
      return browserType;
  }

 function GetXmlTextByTagName(xmlDoc,id)
 {
     var Obj, szTxt = "";
     try
     {
         Obj = xmlDoc.getElementsByTagName(id);
         if (typeof(Obj) == "undefined")
         {
             return szTxt;
         }
         else if ((Obj = Obj.item(0)) == null)
         {
             return szTxt;
         }
         else
         {

             if(MyBrowserType==1)
                 szTxt = Obj.text;
             else
                 szTxt = Obj.textContent;

         }
     }
     catch (objException)
     {
     }
     return szTxt;
 }