"undefined"-flood, requests not receving response, etc

[Uzm]

Hello guys.

I've been working on an AJAX/PHP/MySQL-chat for a bit now, and recently run into a problem that i can't really solve, and getting a bit desperate.

The problem is that i'm getting loads of "undefined" errors, and sometimes requests (aspecially on function getData()) ain't getting response. I've been googling about this a lot, read loads of topics on loads of forums, and more, but i can't solve my problem.

Could you help me a bit?

 

var chatUrl = "http://localhost/chat/";
var imgloaded = new Array();
var msgtime = 1;
var imgdir = "http://localhost/chat/images/";
var sysimages = new Array("info.gif", "pr.gif", "privat.gif");
var sysloaded = new Array();
var loggedIn = false;
var userId;
var userName;
var level;
var yo;
var exitRequest = createRequest();
var sendMsgRequest = createRequest();
var getDataRequest = createRequest();
var enterChatRequest = createRequest();
var loadedTimeout = 3500;
var loadingTimeout = 3500;
var date = new Date();
var timestamp = date.getTime();
var images = new Array(["01.gif", ":цоол"],["02.gif", ":слёзы"],["03.gif", ":дурак"],["04.gif", ":цветы"],["05.gif", ":хурхур"], ["06.gif", ":неа"],["07.gif", ":о"],["08.gif", ":ржу"],["09.gif", ":глазки"],["10.gif", ":роза"],["11.gif", ""],["12.gif", ":сплю"],["13.gif", ""],["14.gif", ":вылез"],["15.gif", ":растяг"],["16.gif", ":ога"],["17.gif", ""],["18.gif", ":обида"],["19.gif", ":двигай"],["20.gif", ":правила"],["21.gif", ":гнев"],["22.gif", ":гы"],["23.gif", ":ура"],["24.gif", ":хмм"],["25.gif", ":ангел"],["26.gif", ":стоп"],["27.gif", ":подлиз"],["28.gif", ":смех"],["29.gif", ":любовь"],["30.gif", ":пока"],["31.gif", ":прости"],["32.gif", ":ляля"],["33.gif", ":смущение"],["34.gif", ":язык"],["35.gif", ":поцелуй"],["36.gif", ":целуются"],["37.gif", ":айкидо"],["38.gif", ":отдых"],["39.gif", ":босс"],["40.gif", ":команда"],["41.gif", ":псих"],["42.gif", ":ковыряю"],["43.gif", ":ах"],["44.gif", ":кик"],["45.gif", ":автомат"],["46.png", ")"],["47.gif", ":палец"],["48.png", ":нини"],["49.png", ":аццтой"],["50.png", ":зелёный"],["51.png", ":молчу"],["52.png", ":молодец"],["53.png", ":гасп"],["54.png", ":херасе"],["55.png", ":зубы"],["56.png", ":брр"],["57.gif", ":слушаю"],["58.gif", ":помидоры"],["59.gif", ":крошим"],["60.gif", ":стена"],["61.gif", ":мат"],["62.gif", ":курю"],["63.gif", ":кенни"],["64.gif", ":программер"],["65.png", ":слюни"],["66.gif", ":соска"],["67.gif", ":пиво"]);

for (i = 0; i < sysimages.length; i++) {
sysloaded[i] = new Image();
sysloaded[i].src = imgdir + sysimages[i];
}

function createRequest() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest();
} else if(window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert("Error initializing XMLHttpRequest!");
}
}

function loaded () {
document.getElementById("win").style.visibility = "visible";
document.getElementById("main").style.visibility = "hidden";
yo = setTimeout('getData()', loadedTimeout);
}

function exit () {
exitRequest.open("POST", chatUrl + "exit.php", true);
exitRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
exitRequest.send("");
clearTimeout(yo);
loggedIn = false;
document.getElementById("main").style.visibility = "visible";
document.getElementById("win").style.visibility = "hidden";
}

function send (msg, to) {
if (sendMsgRequest.readyState == 4 || sendMsgRequest.readyState == 0) {
sendMsgRequest.open("POST", chatUrl + "send.php", true);
sendMsgRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
sendMsgRequest.send("msg=" + encodeURIComponent(msg) + "&userId=" + userId + "&to=" + to + "&timestamp=" + timestamp);
}
}

function getData() {
if (getDataRequest.readyState == 4 || getDataRequest.readyState == 0) {
getDataRequest.open("POST", chatUrl + "get.php", true);
getDataRequest.onreadystatechange = getDataEvent;
getDataRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
getDataRequest.send("userId=" + userId + "&msgtime=" + msgtime + "&timestamp=" + timestamp);
}
if (loggedIn == true) {
yo = setTimeout('getData()', loadingTimeout);
}
}

function getDataEvent() {
if (getDataRequest.readyState == 4) {
if (getDataRequest.status == 200) {
if (getDataRequest.responseText.substr(0,1) == "|") {
clearTimeout(yo);
alert(getDataRequest.responseText.substr(1,getDataRequest.responseText.length - 1));
exit();
}
else {
var lines = getDataRequest.responseText.split('\n');
lines.length = lines.length - 1;
if (lines.length > 0) {
onlineUserList = lines[0].split("|");
onlineUserList.length = onlineUserList.length - 1;
}
if (lines.length > 1) {
for (i = 1; i < lines.length; i++) {
var msg = lines[i].split("|");
try {
parent.talk.printmsg(msg[0],msg[1],msg[2],msg[3]);
} catch (e) {
}
msgtime = msg[4];
}
}
seichas = document.getElementById("chatlan");
mysp = document.createElement("span");
hrprfr = document.createTextNode("ЮЗЕРОВ ОНЛАЙН: " + onlineUserList.length);
mysp.appendChild(hrprfr);
seichas.replaceChild(hrprfr, seichas.firstChild);
parent.menu.printmenu();
}
}
else {
alert("Ошибка запроса к серверу: " + enterRequest.status);
}
}
}

function enterChat (userName, password) {
if (enterChatRequest.readyState == 4 || enterChatRequest.readyState == 0) {
enterChatRequest.open("POST", chatUrl + "enter.php", true);
enterChatRequest.onreadystatechange = enterChatEvent;
enterChatRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
enterChatRequest.send("login=" + userName + "&password=" + password);
}
}

function enterChatEvent() {
if (enterChatRequest.readyState == 4) {
if (enterChatRequest.status == 200) {
if (enterChatRequest.responseText.indexOf("|") != -1) {
var user = enterChatRequest.responseText.split("|");
userId = user[0];
userName = user[1];
level = user[2];
loggedIn = true;
loaded();
}
else if (enterChatRequest.responseText == 'n') {
alert("Ошибка при входе в чат: Вы ввели неправильный логин и/или пароль!");
}
else {
alert("Ошибка при входе в чат: " + enterChatRequest.responseText);
}
}
else {
alert("Ошибка запроса к серверу: " + enterChatRequest.status);
}
}
}