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}