// 163 AJAX Tab
// update 2006.10.18
// 增加鼠標延遲感應特性。
// update 2006.10.8
// A 標簽 href 屬性將保持原有HTML功能。增加urn屬性為AJAX Load 路徑。
// update 2006.10.11
// 修正IE5.0 undefined 未定義錯誤，增加腳本錯誤屏蔽
var Browser = new Object();
Browser.isMozilla = (typeof document.implementation != 'undefined') && (typeof document.implementation.createDocument != 'undefined') && (typeof HTMLDocument!='undefined');
Browser.isIE = window.ActiveXObject ? true : false;
Browser.isFirefox = (navigator.userAgent.toLowerCase().indexOf("firefox")!=-1);
Browser.isOpera = (navigator.userAgent.toLowerCase().indexOf("opera")!=-1);
if (Browser.isFirefox) { // entend Event Mod for FireFox
extendEventObject();
}
function extendEventObject() {
Event.prototype.__defineGetter__("srcElement", function () {
var node = this.target;
while (node.nodeType != 1) node = node.parentNode;
return node;
});

Event.prototype.__defineGetter__("fromElement", function () {
var node;
if (this.type == "mouseover")
node = this.relatedTarget;
else if (this.type == "mouseout")
node = this.target;
if (!node) return;
while (node.nodeType != 1) node = node.parentNode;
return node;
});

Event.prototype.__defineGetter__("toElement", function () {
var node;
if (this.type == "mouseout")
node = this.relatedTarget;
else if (this.type == "mouseover")
node = this.target;
if (!node) return;
while (node.nodeType != 1) node = node.parentNode;
return node;
});
}
function IsChild(cNode,pNode){
while(cNode!=null){
cNode=cNode.parentNode;
if(cNode==pNode) return true;
}
return false;
}

var ajccache=new Object();
var waitInterval;
var tempref;
var MouseDelayTime=150;//鼠標感應延遲300毫秒
function getTBprefixName(str,sta){
if(str.indexOf("active")!=-1 || str.indexOf("normal")!=-1) str=str.substr(6);
else if(str.indexOf("over")!=-1) str=str.substr(4);
else str="";
return sta+str;
}
function startajaxtabs(){
for(var i=0;i<arguments.length;i++)
{
var ulobj=document.getElementById(arguments[i]);
ulist=ulobj.getElementsByTagName("li");
for(var j=0;j<ulist.length;j++)
{
var thelist=ulist[j];
if(thelist.parentNode.parentNode!=ulobj) continue;//只有第一層li有效 fixed 2006.9.29
var ulistlink=thelist.getElementsByTagName("a")[0];
var ulistlinkurl=ulistlink.getAttribute("urn");
var ulistlinktarget=ulistlink.getAttribute("rel");
thelist.setActive=function(bactive){
if(bactive){
this.status="active";
this.className=getTBprefixName(this.className,"active");
}else{
this.status="normal";
this.className=getTBprefixName(this.className,"normal");
}
}
thelist.LoadTab=function(){
this.setActive(true);
this.parentNode.parentNode.activetab.setActive(false);
this.parentNode.parentNode.activetab=this;
var ulistlink=this.getElementsByTagName("a")[0];
loadAJAXTab(ulistlink.getAttribute("urn"),ulistlink.getAttribute("rel"));
}
thelist.onmouseover=function(aEvent){
var myEvent = window.event ? window.event : aEvent;
var fm=myEvent.fromElement;
if(IsChild(fm,this) || fm==this) return;//過濾子元素event
if(this.status=="active") return;
tempref=this;
clearTimeout(waitInterval);
waitInterval=window.setTimeout("tempref.LoadTab();",MouseDelayTime);
}

thelist.onmouseout=function(aEvent){
var myEvent = window.event ? window.event : aEvent;
var em=myEvent.toElement;
if(IsChild(em,this) || em==this) return; //過濾子元素event
if(this.status=="active") return;
clearTimeout(waitInterval);
}

if(ulistlinkurl.indexOf("#default")!=-1){
thelist.setActive(true);
ulobj.activetab=thelist;
ajccache[ulistlinkurl]=getElement(ulistlinktarget).innerHTML;
}else{
thelist.setActive(false);
}

}
if(ulobj.activetab==null) ulobj.activetab=ulist[0];
}
}

function getXmlhttp()
{
var http_request;

if(window.XMLHttpRequest) {
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType("text/xml");
}
}
else if (window.ActiveXObject) {
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
window.alert("can't create XMLHttpRequest object.");
return null;
}
return http_request;
}

function loadAJAXTab(url,contentid){
var ocontent=getElement(contentid);
if(ajccache[url]==null) {
var xhttp=getXmlhttp();
xhttp.onreadystatechange=function(){
if(xhttp.readyState == 4 && (xhttp.status==200 || window.location.href.indexOf("http")==-1))
{
ocontent.innerHTML=xhttp.responseText;
ajccache[url]=ocontent.innerHTML;
}
}
xhttp.open("GET",url,true);
xhttp.send(null);
}else{
ocontent.innerHTML=ajccache[url];
}
}
window.onerror=function(){return true}