AJAX Ó¦ÓÃ

<script type="text/javascript">
function addUrl(){
//1¡¢ÉèÖÃÇëÇóurlµØÖ·
var name = document.getElementById("name").value;
var text = document.getElementById("url").value;
var url = "insertUrl.do?name="+name+
"&url="+text+"&time"+new Date() ;
//2¡¢´´½¨xmlHttpRequest¶ÔÏó
xmlHttpRequest = createXmlHttpRequest();
//3¡¢ÉèÖÃxmlHttpRequest¶ÔÏóµÄ»Øµ÷º¯Êý
xmlHttpRequest.onreadystatechange = execute ;
//4¡¢×¢²áxmlHttpRequest¶ÔÏó
xmlHttpRequest.open("get",url,true);
//5¡¢·¢ËÍÇëÇó
xmlHttpRequest.send(null);
}
//´´½¨xmlHttpRequest¶ÔÏó·½·¨
function createXmlHttpRequest(){
//Èç¹ûÊÇIEä¯ÀÀÆ÷
if(window.ActiveXObject){
return new ActiveXObject("Microsoft.XMLHTTP");
}
//·ÇIEä¯ÀÀÆ÷
if(window.XMLHttpRequest){
return new XMLHttpRequest();
}
}
//»Øµ÷º¯Êý
function execute(){
//µ±xmlHttpRequestµÄ״̬Ϊ½ÓÊÕ½á¹û²¢Íê±ÏºÍ·þÎñÆ÷·µ»Ø״̬ΪÕý³£Ö´ÐÐˢв¿·ÖÒ³Ãæ
if(xmlHttpRequest.readyState == 4 &&
xmlHttpRequest.status == 200){
if(xmlHttpRequest.responseText=="true"){

alert("Ìí¼Ó³É¹¦£¡");

//Ìí¼Óµ½ÏÂÀ­Áбí
var obj = document.getElementById("myUrl");
var name =
document.getElementById("name").value;
var text =
document.getElementById("url").value;
var op = new Option(name,text);
obj.options.add(op);

//Òþ²Ø²ã
showAddUrl();
}
}
}
½âÎöXML·µ»ØµÄÀý×Ó
//»Øµ÷º¯Êý
function execute(){
//µ±xmlHttpRequestµÄ״̬Ϊ½ÓÊÕ½á¹û²¢Íê±ÏºÍ·þÎñÆ÷·µ»Ø״̬ΪÕý³£Ö´ÐÐˢв¿·ÖÒ³Ãæ
if(xmlHttpRequest.readyState == 4 &&
xmlHttpRequest.status == 200){
alert("Ìí¼Ó³É¹¦£¡");

//Ìí¼Óµ½ÏÂÀ­Áбí
var obj = document.getElementById("myUrl");
//Ìí¼Ó֮ǰÏÈÇå¿ÕÁбí
obj.options.length = 0 ;

//»ñÈ¡xmlHttpRequest·µ»ØµÄxml¶ÔÏó
(ÀûÓÃJavaScriptµÄDOMÄ£Ðͽ«´Ëxml½âÎö³öÀ´)
xmlDoc = xmlHttpRequest.responseXml;

//»ñÈ¡¸ù½Úµã
myUrl = xmlDoc.documentElement ;

//Ñ­»·±éÀú¸ù½ÚµãµÄËùÓÐ×Ó½Úµã
for(var x=0;x<myUrl.childNodes.length;x++){
m