狂郁闷 我的ajax第三个例子就把我给搞死了 主要问题 getElementsByTagName返回总是0 - Web 开发 / Ajax
parseXML.html
- HTML code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>paesing XML Response 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==200){
if(requestType=="north"){
listNothStates();
}
else if(requestType=="all"){
listAllStates();
}
}
}
}
function listNorthStates()
{
var xmlDoc=xmlHttp.responseXML;
var northNode=xmlDoc.getElementsByTagName("north")[0];
var out="Northern States";
var northStates=northNode.getElementsByTagName("state");
outputList("Northern States ",northStates);
}
function listAllStates()
{
var xmlDoc=xmlHttp.responseXML;
var allStates=xmlDoc.getElementsByTagName("state");
outputList("All States in Document",allStates);
}
function outputList(title,states)
{
var out=title;
var currentState=null;
for(var i=0;i <states.length;i++)
{
currentState=states[i];
out=out+"\n-"+currentState.childNodes[0].nodeValue;
}
alert(out);
}
</script>
</head>
<body>
<h1>process xml document of u.s. states </h1>
<form action="#">
<br /> <br />
<input type="button" value="view all listed states"
onclick="startRequest('all');" />
<br /> <br />
<input type="button" value="view all listed north northern states"
onclick="startRequest('north');" />
</form>
</body>
</html>
parseXML.xml
- XML code
<?xml version="1.0" encoding="UTF-8"?><states> <north> <state>Minnesota</state> <state>Iowa</state> <state>North Dakota</state> </north> <south> <state>Texas</state> <state>Oklahoma</state> <state>Louisiana</state> </south> <east> <state>New York</state> <state>North Carolina</state> <state>Massachusetts</state> </east> <west> <state>California</state> <state>Oregon</state> <state>Nevada</state> </west></states>
用getElementsByTagName("state")就是返回0
搞了一个小时 还是问一下吧
[解决办法]
而且看你的编码也不正确
html为gb2312的,xml为utf-8.......
改两个的编码为一样
如果都为utf-8时,注意文件存储的编码也为utf-8