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IE和FF中读取XML的有关问题

日期：2014-05-16　 浏览次数：20753 次

IE和FF中读取XML的问题 - Web 开发 / Ajax
源代码如下:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Parsing XML Responses with the W3C DOM</title>
   
<script type="text/javascript">
  var xmlHttp;
  var requestType = "";
   
  function createXMLHttpRequest()
  {
  if(window.ActiveXObject)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHttp");
  }
  else if(window.XMLHttpRequest)
  {
  xmlHttp=new XMLHttpRequest();  
  }
  }
   
  function startRequest(requestedList)
  {
  requestType=requestedList;
  createXMLHttpRequest();
  xmlHttp.onreadystatechange=handleStateChange;
  xmlHttp.open("GET","parseXML.xml",true);
  xmlHttp.send(null);
  }
   
  function handleStateChange()
  {
  if(xmlHttp.readyState==4)
  if(xmlHttp.status==0)
  {
  if(requestType=="north")
  listNorthStates();
  else if(requestType=="all")
  listAllStates();  
  }
  }
   
  function listNorthStates()
  {
  var xmlDoc=xmlHttp.responseXML;
  alert(xmlDoc.getElementsByTagName("states").length); [b]//IE中返回0,FF中返回1[/b] alert(xmlDoc.getElementsByTagName("state").length); //IE中返回0,FF中返回12
  var northNode=xmlDoc.getElementsByTagName("north")[0]; //northNode赋值后仍为null  
  var out="Northern States";
  var northStates=northNode.getElementsByTagName("state");
  outputList(out,northStates);
  }
   
  function listAllStates()
  {
  var xmlDoc=xmlHttp.responseXML;
  var out="All States";
  var allStates=xmlDoc.getElementsByTagName("state");
  outputList(out,allStates)
  }
   
  function outputList(tit,states)
  {
  var out=tit;
  for(var i=0;i<states.length;i++)
  {
  var stateName=states[i].childNodes[0].nodeValue;
  tit+="\n-"+stateName;
  } 
  alert(tit);
  }
</script>

</head>

<body>
  <h1>Process XML Document of U.S. States</h1>
  <br/><br/>
  <form action="#">
  <input type="button" value="View All Listed States" onclick="startRequest('all')" />
  <input type="button" value="View All Listed Northern States" onclick="startRequest('north')" />
  </form>
</body>
</html>

parseXML.xml
<?xml version="1.0" encoding="UTF-8"?>
<states>
  <north>
  <state>Minnesota</state>
  <

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