var msgInterval, usrInterval;
var updateMsgInterval = 5000;
var updateUsrInterval = 20000;
var smileyStatus = 0; //hide
var maxMsgID = 0; // initial value
function updateMsg()
{
var xmlHttp;
document.body.style.cursor='default';
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
alert("Your browser does not support AJAX!");
return false;
}
}
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
var str=xmlHttp.responseText;
//alert(str);
//var i= str.indexOf('');
//var j = str.indexOf('');
var x = str.indexOf("")+7;
var y = str.indexOf("");
var returnMaxMsgID = parseInt(str.substring(x, y));
if (returnMaxMsgID > maxMsgID)
{
// update the client
document.getElementById("message_list").innerHTML=str;
//document.getElementById("message_list").innerHTML=str.substring(i+ 6,j);
objDiv = document.getElementById("message_list");
objDiv.scrollTop = 0;
objDiv.scrollTop = objDiv.scrollHeight;
// Also, update client variable maxMsgID to latest message ID
maxMsgID = returnMaxMsgID;
}
}
}
//xmlHttp.open("GET","chat_messages.asp",true);
xmlHttp.open("GET","chat_messages.asp?MaxID=" + maxMsgID.toString(),true);
xmlHttp.setRequestHeader( "Content-Type", "text/HTML");
xmlHttp.setRequestHeader( "CharSet", "UTF-8");
xmlHttp.send(null);
document.body.style.cursor='auto';
}
function updateUsr()
{
var xmlHttp;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
alert("Your browser does not support AJAX!");
return false;
}
}
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
document.getElementById("member_list").innerHTML=xmlHttp.responseText;
objDiv = document.getElementById("member_list");
objDiv.scrollTop = objDiv.scrollHeight;
}
}
xmlHttp.open("GET","chat_members.asp",true);
xmlHttp.setRequestHeader( "Content-Type", "text/HTML");
xmlHttp.setRequestHeader( "CharSet", "UTF-8");
xmlHttp.send(null);
}
function postMessage()
{
document.body.style.cursor='default';
// get information from submit form
name = document.frmShoutbox.name.value;
msg = document.frmShoutbox.msg.value;
color = document.frmShoutbox.color.options[document.frmShoutbox.color.selectedIndex].value;
fsize = document.frmShoutbox.fsize.options[document.frmShoutbox.fsize.selectedIndex].value;
if (msg == "")
{
alert('Vui long nhap noi dung!');
}
else
{
var xmlHttp;
var numOfSmileys = 35;
try
{
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer
try
{
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
alert("Your browser does not support AJAX!");
return false;
}
}
}
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
currentMessages = document.getElementById("message_list").innerHTML;
for (var x = 1; x <= numOfSmileys; x++)
{
msg = msg.replace("-" + x + "-", " ![](images/smileys/" + x + ".gif)
");
}
updatedMessage = currentMessages + " " + name + ":" + " " + msg + "
";
document.getElementById("message_list").innerHTML=updatedMessage;
objDiv = document.getElementById("message_list");
objDiv.scrollTop = 0;
objDiv.scrollTop = objDiv.scrollHeight;
// clear the input text field
document.frmShoutbox.msg.value = "";
}
}
var url = "chat_add.asp?name=" + encodeURIComponent(name) + "&msg=" + encodeURIComponent( msg)+"&color=" + color + "&fsize=" + fsize;
xmlHttp.open("GET",url,true);
xmlHttp.setRequestHeader( "Content-Type", "text/HTML");
xmlHttp.setRequestHeader( "CharSet", "UTF-8");
xmlHttp.send(null);
// xmlHttp.open("POST", "chat_add.asp", false);
//xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
//xmlHttp.send(params);
}
document.body.style.cursor='auto';
}
function startUpdatingMsg()
{
msgInterval = setInterval ("updateMsg()", updateMsgInterval);
}
function stopUpdatingMsg()
{
clearInterval(msgInterval);
}
function startUpdatingUsr()
{
usrInterval = setInterval ("updateUsr()", updateUsrInterval);
}
function stopUpdatingUsr()
{
clearInterval(usrInterval);
}
function disableEnterKey(e)
{
var key;
if(window.event)
key = window.event.keyCode; //IE
else
key = e.which; //firefox
if (key == 13)
{
postMessage();
}
return (key != 13);
}
function toggleSmileys(id)
{
var myStatus;
if (smileyStatus == 1)
{
smileyStatus = 0;
myStatus = 'none';
}
else
{
smileyStatus = 1;
myStatus = 'block';
}
if (document.getElementById) { // DOM3 = IE5, NS6
document.getElementById(id).style.display = myStatus;
}
else {
if (document.layers) { // Netscape 4
document.id.display = myStatus;
}
else { // IE 4
document.all.id.style.display = myStatus;
}
}
}
function insertAtCursor_NEW(myField, myValue) {
//IE support
if (document.selection) {
var temp;
myField.focus();
sel = document.selection.createRange();
temp = sel.text.lenght;
sel.text = myValue;
if (myValue.length == 0) {
sel.moveStart('character', myValue.length);
sel.moveEnd('character', myValue.length);
} else {
sel.moveStart('character', -myValue.length + temp);
}
sel.select();
}
//MOZILLA/NETSCAPE support
else if (myField.selectionStart || myField.selectionStart == '0') {
var startPos = myField.selectionStart;
var endPos = myField.selectionEnd;
myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);
myField.selectionStart = startPos + myValue.length;
myField.selectionEnd = startPos + myValue.length;
} else {
myField.value += myValue;
}
}