当前位置: 首页 > 图文教程 > 网络编程 > Javascript > 来自chinaz的ajax获取评论代码

Javascript
javascript options属性集合操作代码
javascript 鼠标悬浮图片显示原图 移出鼠标后原图消失(多图)
javascript 显示当前系统时间代码
firefox和IE系列的相关区别整理 以备后用
extJs 常用到的增,删,改,查操作代码
Javascript 面向对象特性
JavaScript的public、private和privileged模式
通过javascript设置css属性的代码
javascript iframe编程相关代码
滚动条变色 隐藏滚动条与双击网页自动滚屏显示代码
js DOM模型操作
js 学习笔记(三)
用js做一个小游戏平台 (一)
jquery UI 1.72 之datepicker
jQuery的三种$()
JavaScript 常用函数
用javascript实现源代码的隐藏与解密的方法
javascript Onunload与Onbeforeunload使用小结
Javascript的闭包
JavaScript 对Cookie 操作的封装小结

Javascript 中的 来自chinaz的ajax获取评论代码


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-09-12   浏览: 214 ::
收藏到网摘: n/a

chinaz利用了ajax实现评论的读取操作,下面我们参考chinaz的代码 ajax获取到的字符是类似下面的内容
复制代码 代码如下:

{a:"<div class='pl_list'><div><span class='float_right'><a href=javascript:goodbad(22835,26769,'good',1) title='支持一下'>支持:[ 0 ]</a> <a href=javascript:goodbad(22835,26769,'bad',1) title='我反对'>反对:[ 0 ]</a></span><span class='zz'>中国站长站网友:匿名 于 2008-04-25 评论道:</span></div>谁认为投放了Google AdSense的站点就不允许进行推广了?傻子吧</div>",b:1}

然后用下面的ajax进行输出
复制代码 代码如下:

var key='';
var str=new Array();
function createAjaxObj(){
var httprequest=false
//document.domain='chinaz.com';
if (window.XMLHttpRequest){ // if Mozilla, Safari etc
httprequest=new XMLHttpRequest()
if (httprequest.overrideMimeType)
httprequest.overrideMimeType('text/xml');
}
else if (window.ActiveXObject){ // if IE
try
{
httprequest=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
httprequest=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e){}
}
}
return httprequest;
}
function load_feedback(arcID,pg){
/*
var url = "http://www.chinaz.com/plus/feedback_ajax.php?action=show&arcID="+arcID+"&pg="+pg;
var ajax = new oAjax();
// 是否显示错误
//ajax.error = true;
// 请求的页面的编码为'gb2312'或空
//ajax.encode = 'gb2312';
// 回调函数
ajax.callback = function (content) {
// 处理返回内容
eval('var obj = ' + content);
document.getElementById('fedbk').innerHTML=obj.a;
document.getElementById('fedcount').innerHTML=obj.b;
};
ajax.send(url);
*/
var xmlhttp = createAjaxObj();
try
{
var params="action=show&arcID="+arcID+"&pg="+pg;
xmlhttp.abort();
xmlhttp.open("get","/plus/feedback_ajax.php?"+params,true);
xmlhttp.setRequestHeader("Content-type", "text/html;charset=gb2312");
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange=f
xmlhttp.send(null);
}catch(ex){}
function f()
{
if(xmlhttp.readyState!= 4 || xmlhttp.status!=200 )
return ;
var b= xmlhttp.responseText;
var obj = eval("("+b+")");
document.getElementById('fedbk').innerHTML=obj.a;
document.getElementById('fedcount').innerHTML=obj.b;
document.getElementById('feedcounttop').innerHTML=obj.b;
}
}

function load_allfeedback(arcID,pg){
var xmlhttp = createAjaxObj();
try
{
var params="action=showall&arcID="+arcID+"&pg="+pg;
xmlhttp.abort();
xmlhttp.open("get","/plus/feedback_ajax.php?"+params,true);
xmlhttp.setRequestHeader("Content-type", "text/html;charset=gb2312");
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange=f
xmlhttp.send(null);
}catch(ex){}
function f()
{
if(xmlhttp.readyState!= 4 || xmlhttp.status!=200 )
return ;
var content= xmlhttp.responseText;
var obj = eval("("+content+")");
// eval('var obj = ' + content);
document.getElementById('fedbk').innerHTML=obj.a;
//document.getElementById('fedcount').innerHTML=obj.b;
}
}
function feed_back(){
var msg = trim(document.getElementById('msg').value);
var arcID = document.getElementById('arcID').value;
var username = trim(document.getElementById('username').value);
var pwd = trim(document.getElementById('pwd').value);
var checkbox = document.getElementById('notuser');
if(checkbox.checked)
var notuser = 1;
else
var notuser = 0;

var xmlhttp = createAjaxObj();
try
{
params="action=send&arcID="+arcID+"&msg="+msg+"&username="+username
+"&pwd="+pwd+"¬user="+notuser;
xmlhttp.abort();
xmlhttp.open("get","/plus/feedback_ajax.php?"+params,true);
xmlhttp.setRequestHeader("Content-type", "text/html;charset=gb2312");
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange=f
xmlhttp.send(null);
}catch(ex){}
function f()
{
if(xmlhttp.readyState!= 4 || xmlhttp.status!=200 )
return ;
var arr = xmlhttp.responseText.split("@:");
if(!arr[1]){
alert(xmlhttp.responseText);
}
else{
if(arr[0] != 'true')
alert(arr[0]);
alert(arr[2]);
ck_yzimg();
load_feedback(arr[1],1);
}
}
}
function goodbad(fid,arcid,actname,pg){

var xmlhttp = createAjaxObj();
try
{
params = "action="+actname+"&fid="+fid+"&arcID="+arcid+"&pg="+pg;
xmlhttp.abort();
xmlhttp.open("get","/plus/feedback_ajax.php?"+params,true);
xmlhttp.setRequestHeader("Content-type", "text/html;charset=gb2312");
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange=f
xmlhttp.send(null);
}catch(ex){}
function f()
{
if(xmlhttp.readyState!= 4 || xmlhttp.status!=200 )
return ;
var arr = xmlhttp.responseText.split("@:");
if(!arr[1])
alert(xmlhttp.responseText);
else{
alert(arr[0]);
load_feedback(arr[1],arr[2]);
}
}
}
function goodbad2(fid,arcid,actname,pg){

var xmlhttp = createAjaxObj();
try
{
params = "action="+actname+"&fid="+fid+"&arcID="+arcid+"&pg="+pg;
xmlhttp.abort();
xmlhttp.open("get","/plus/feedback_ajax.php?"+params,true);
xmlhttp.setRequestHeader("Content-type", "text/html;charset=gb2312");
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.setRequestHeader("Content-length", params.length);
xmlhttp.setRequestHeader("Connection", "close");
xmlhttp.onreadystatechange=f
xmlhttp.send(null);
}catch(ex){}
function f()
{
if(xmlhttp.readyState!= 4 || xmlhttp.status!=200 )
return ;
var arr = xmlhttp.responseText.split("@:");
if(!arr[1])
alert(xmlhttp.responseText);
else{
alert(arr[0]);
load_allfeedback(arr[1],arr[2]);
}
}
}
function pg(vl){
var arcID = document.getElementById('arcID').value;
load_feedback(arcID,vl);
}
function pg2(arcID,vl){
//var arcID = document.getElementById('arcID').value;
load_allfeedback(arcID,vl);
}
function ck_yzimg(){
//document.all.cknum.value='';
document.all.msg.value='';
document.all.username.value='';
document.all.pwd.value='';
document.getElementsByName('sb')[0].disabled = false;
//document.all.img1.onclick();
}
function trim(s) {
return s.replace( /^\s*/, "" ).replace( /\s*$/, "" );
}
//////
/*
String.prototype.Contains = function(str) {
return (this.indexOf(str) > -1);
};
var Browser = {
s : navigator.userAgent.toLowerCase()
};
(function (b) {
b.IsIE = b.s.Contains('msie');
b.IsIE5 = b.s.Contains('msie 5');
b.IsIE6 = b.s.Contains('msie 6');
b.IsIE7 = b.s.Contains('msie 7');
b.IsIE56 = !b.IsIE7 && (b.IsIE6 || b.IsIE5);
b.IsGecko = b.s.Contains('gecko');
b.IsSafari = b.s.Contains('safari');
b.IsOpera = b.s.Contains('opera');
b.IsMac = b.s.Contains('macintosh');
b.IsIELike = (b.IsIE || b.IsOpera);
b.IsGeckoLike = (b.IsGecko || b.IsSafari);
}) (Browser);
function oAjax () {
this.req = null;
this.url = '';
this.content = '';
this.type = 'text';
this.encode = '';
this.asyn = true;
this.action = 'get';
this.error = false;
}
oAjax.prototype.init = function () {
if (window.XMLHttpRequest) {
this.req = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
// isIE = true;
try {
this.req = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
this.req = new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e) {
this.req = false;
}
}
}
var self = this;
if (this.req) {
this.req.onreadystatechange = function () {self.listener()};
}
};
oAjax.prototype.listener = function () {
if (this.req.readyState == 4) {
if (this.req.status == 200) {
// right
try {
this.callback(Browser.IsIE && this.encode == 'gb2312' ? oAjax.gb2utf8(this.req.responseBody) : (this.type == 'text' ? this.req.responseText : this.req.responseXML));
}
catch (e) {
this.halt('[callback] ' + e.name + ':' + e.message);
}
}
else {
// error
this.halt('[callback error] ' + this.req.status);
}
}
};
oAjax.prototype.send = function (url) {
this.init();
url = this.url = url || this.url || '';
this.content = !!this.content ? this.content : '';
this.encode = this.encode ? this.encode.toLowerCase() : '';
this.asyn = this.asyn == undefined ? true : !!this.asyn;
this.action = (this.action == undefined || this.action == 'get') ? 'Get' : 'Post';
this.error = this.error == undefined ? false : !!this.error;
if (! url && this.error) {
alert('Ajax请求URL不能为空。');
return;
}
try {
this.req.open(this.action, url, this.asyn);
}
catch (e) {
this.halt('[open] ' + e.name + ':' + e.message);
return;
}
try {
this.req.setRequestHeader('Connection', 'close');
this.req.setRequestHeader('Accept-Encoding', 'gzip, deflate');
this.req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded' + (this.encode ? ';charset=' + this.encode : ''));
if(this.req.overrideMimeType && this.encode) {
this.req.overrideMimeType('text/xml' + (this.encode ? ';charset=' + this.encode : ''));
}
this.req.send(this.content);
}
catch (e) {
this.halt('[open] ' + e.name + ':' + e.message + '\n** 检查是否为跨域访问。');
}
};
oAjax.prototype.callback = function (content) {
//alert(content);
};
// abort
oAjax.prototype.abort = function () {
this.req.abort();
};
oAjax.prototype.halt = function (description) {
this.error && alert(description);
};
// gb2312 to utf8
oAjax.gb2utf8 = function (data) {
var glbEncode = [];
gb2utf8_data = data;
execScript("gb2utf8_data = MidB(gb2utf8_data, 1)", "VBScript");
var t = escape(gb2utf8_data).replace(/%u/g,"").replace(/(.{2})(.{2})/g,"%$2%$1").replace(/%([A-Z].)%(.{2})/g,"@$1$2");
t = t.split("@");
var i=0, j = t.length, k;
while(++i < j) {
k = t[i].substring(0,4);
if(!glbEncode[k]) {
gb2utf8_char = eval("0x" + k);
execScript("gb2utf8_char = Chr(gb2utf8_char)", "VBScript");
glbEncode[k] = escape(gb2utf8_char).substring(1, 6);
}
t[i] = glbEncode[k] + t[i].substring(4);
}
gb2utf8_data = gb2utf8_char = null;
return unescape(t.join("%"));
}
*/

核心代码
复制代码 代码如下:

var b= xmlhttp.responseText;
var obj = eval("("+b+")");
document.getElementById('fedbk').innerHTML=obj.a;
document.getElementById('fedcount').innerHTML=obj.b;
document.getElementById('feedcounttop').innerHTML=obj.b;