163 AJAX

// 163 AJAX Tab
// update 2006.10.18
// 增加鼠标延迟感应特性。
// update 2006.10.8
// A 标签 href 属性将保持原有HTML功能。增加urn属性为AJAX Load 路径。
// update 2006.10.11
// 修正IE5.0 undefined 未定义错误，增加脚本错误屏蔽
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;//鼠标感应延迟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;iarguments.length;i++)
    {
        var ulobj=document.getElementById(arguments[i]);
            ulist=ulobj.getElementsByTagName("li");
            for(var j=0;julist.length;j++)
            {
                var thelist=ulist[j];
                if(thelist.parentNode.parentNode!=ulobj) continue;//只有第一层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;//过滤子元素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; //过滤子元素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}