ajax 常用代码

 

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;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}
//xml.js
var xhr;
function getXHR()
{
 try {
  xhr=new ActiveXObject("Msxml2.XMLHTTP");
 } catch (e) {  
  try {
   xhr=new ActiveXObject("Microsoft.XMLHTTP");
  } catch (e) {   
   xhr=false;
  }
 }
 if(!xhr&&typeof XMLHttpRequest!='undefined')
 {
  xhr=new XMLHttpRequest();
 } 
 
 return xhr;
}
function openXHR(method,url,callback)
{
 getXHR();
 xhr.open(method,url);
 xhr.onreadystatechange=function()
 {
  if(xhr.readyState!=4)return;
  callback(xhr);  
 }
 xhr.send(null);
}
function loadXML(method,url,callback)
{
 getXHR();
 xhr.open(method,url);
 xhr.setRequestHeader("Content-Type","text/xml");
 xhr.setRequestHeader("Content-Type","GBK");
 xhr.onreadystatechange=function()
 {
  if(xhr.readyState!=4)return;
  callback(xhr.responseXML);
 }
 xhr.send(null);
}

function getElement(aID)
{
  return (document.getElementById) ? document.getElementById(aID): document.all[aID];
}

 

 

function enterSubmit(event){
var obj = event.srcElement?event.srcElement:event.target;
var login = obj.form;
if(event.keyCode==13){loginSubmit(login);}
}

 

 

function getCookieVal (offset) {
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
  endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie (name) {
  var arg = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen) {
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
      return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0)
       break;
  }
  return "";
}
function SetCookie(cookieName,cookieValue,nDays) {
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue) + ";path=/;domain=.163.com;expires="+expire.toGMTString();
}

 

 function isIE6(){
   var notMSIE=(navigator&&navigator.userAgent.toLowerCase().indexOf("msie")==-1);
   if(!notMSIE){
 if(navigator.appVersion.indexOf("MSIE 6") != -1)
  return true;
    }
   return false;
}