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比较文档位置
关于document.cookie的使用javascript
js让一行页脚保持在底部
多浏览器兼容的右下角广告代码(已测)
javascript onkeydown实现键盘快捷键控制页面
javascript的键盘控制事件说明
不懂JavaScript应该怎样学
用javascript实现截取字符串包含中文处理的函数
摘自启点的main.js
js tab效果代码增强版
慢慢展开再慢慢收起的javascript广告效果
javascript String 对象
JS查看对象功能代码
javascript点击才出现验证码
js实现双击单元格变成文本输入框效果代码
js通用滑动门类
js动画效果打开层 关闭层
js插入字符到textarea的效果代码
javascript 获取网页标题
js调用flash的效果代码

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: 131 ::
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;