JS XML 구현 코드 분석

 
<script language="javascript" type="text/javascript"> 
//     xml   
var uRl = "jsReadXml.xml"; 
var xmlDoc; 
//   ，          
// function showcurcity(){ 
if(window.ActiveXObject) 
{ 
xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); 
xmlDoc.async="false" 
xmlDoc.load(uRl); 
getvalue(); 
} 
else if(document.implementation && document.implementation.createDocument) 
{ 
xmlDoc=document.implementation.createDocument("", "root", null); 
xmlDoc.load(uRl); 
xmlDoc.onload=getvalueff; 
} 
// else { 
// return null; 
// } 
// } 
function getvalue() 
{ 
var nodes=xmlDoc.documentElement.childNodes; 
var now=new Date(); 
for(i=0;i<nodes.length;i++){ 
var value=nodes.item(i).childNodes.item(0).text ; 
alert(nodes.item(i).childNodes.item(1).text); 
alert(nodes.item(i).childNodes.item(2).text); 
} 
} 
function getvalueff(){ 
var cCode=xmlDoc.getElementsByTagName("date"); 
var now = new Date(); 
var nowvalue=now.getFullYear()+' '+(now.getMonth()+1)+' '+now.getDate()+' '; 
for(i=0;i<cCode.length;i++) 
{ 
alert(xmlDoc.getElementsByTagName("imgsrc")[i].childNodes[0].nodeValue); 
alert(xmlDoc.getElementsByTagName("title")[i].childNodes[0].nodeValue); 
alert(xmlDoc.getElementsByTagName("url")[i].childNodes[0].nodeValue); 
} 
} 
</script> 

 
<?xml version="1.0" encoding="UTF-8" ?> 
<root> 
<imags> 
<imgsrc>images/ad-01.jpg</imgsrc> 
<title>    </title> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hochiminhcity/</url> 
</imags> 
<imags> 
<imgsrc>images/ad-02.jpg</imgsrc> 
<title>  2</title> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url> 
</imags> 
<imags> 
<imgsrc>images/ad-03.jpg</imgsrc> 
<title>  3</title> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url> 
</imags> 
<imags> 
<imgsrc>images/ad-04.jpg</imgsrc> 
<title>  4</title> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url> 
</imags> 
<imags> 
<imgsrc>images/ad-05.jpg</imgsrc> 
<title>  5</title> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url> 
</imags> 
</root> 

 
<script language="javascript" type="text/javascript"> 
var xmlDoc; 
function showcurcity() 
{ 
if(window.ActiveXObject) 
{ 
xmlDoc=new ActiveXObject("Microsoft.XMLDOM"); 
xmlDoc.async="false" 
xmlDoc.load("OlyCity.xml"); 
getvalue(); 
} 
else if(document.implementation && document.implementation.createDocument) 
{ 
xmlDoc=document.implementation.createDocument("", "root", null); 
xmlDoc.load('OlyCity.xml'); 
xmlDoc.onload=getvalueff; 
} 
else 
{ 
return null; 
} 
} 
function getvalue() 
{ 
var nodes=xmlDoc.documentElement.childNodes; 
var now=new Date(); 
for(i=0;i<nodes.length;i++){ 
var value=nodes.item(i).childNodes.item(0).text ; 
if(value==now.toLocaleDateString()) 
{ 
window.document.getElementById('curcity').innerText=nodes.item(i).childNodes.item(1).text; 
window.document.getElementById('curcity').href =nodes.item(i).childNodes.item(2).text; 
} 
} 
} 
function getvalueff(){ 
var cCode=xmlDoc.getElementsByTagName("date"); 
var now = new Date(); 
var nowvalue=now.getFullYear()+' '+(now.getMonth()+1)+' '+now.getDate()+' '; 
for(i=0;i<cCode.length;i++) 
{ 
var value=cCode[i].childNodes[0].nodeValue; 
if(value==nowvalue) 
{ 
window.document.getElementById('curcity').href =xmlDoc.getElementsByTagName("url")[i].childNodes[0].nodeValue;; 
window.document.getElementById('curcity').childNodes[0].nodeValue=xmlDoc.getElementsByTagName("city")[i].childNodes[0].nodeValue; 
} 
} 
} 
setInterval(showcurcity,1000); 
</script> 

 
<?xml version="1.0" encoding="gb2312" ?> 
<root> 
<citymessage> 
<date>2008 4 29 </date> 
<city>    </city> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hochiminhcity/</url> 
</citymessage> 
<citymessage> 
<date>2008 4 30 </date> 
<city>  </city> 
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url> 
</citymessage> 
</root>