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 innerText和innerHtml应用
图像替换新技术 状态域方法
JavaScript 判断判断某个对象是Object还是一个Array
Extjs 几个方法的讨论
JavaScript 学习笔记(十五)
javascript 匿名函数的理解(透彻版)
Jquery 常用方法经典总结
jquery 批量上传图片实现代码
javascript中的array数组使用技巧
详细讲解JS节点知识
javascript让setInteval里的函数参数中的this指向特定的对象
javaScript 关闭浏览器 (不弹出提示框)
对字符串进行HTML编码和解码的JavaScript函数
javascript 三种编解码方式
js左侧多级菜单动态的解决方案
JavaScript 学习笔记(十六) js事件
JavaScript面向对象之静态与非静态类
javascript两段代码,两个小技巧
js中鼠标滚轮事件详解(firefox多浏览器)
js实现的仿Photoshop鼠标滚轮控制输入框取值(修正兼容Chrome)

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: 126 ::
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;