PDA

View Full Version : Ajax news bar problem


Richy
05-05-2009, 06:45 PM
Hello,
I have this script;

<html>
<head>
<script type="text/JavaScript" language="JavaScript">
var xmlHttp=false;
try {
xmlHttp = new ActiveXObject("Msxml2.xmlHttp");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.xmlHttp");
}
catch (E) {
xmlHttp = false;
}
}
if (!xmlHttp && typeof XMLHttpRequest!='undefined') {
try {
xmlHttp = new XMLHttpRequest();
}
catch (e) {
xmlHttp=false;
}
}
if (!xmlHttp && window.createRequest) {
try {
xmlHttp = window.createRequest();
}
catch (e) {
xmlHttp=false;
}
}
function callServer(){
//burada çağiracağin sayfayı yazarsın
var url = "xml.php";

xmlHttp.open("GET", url, true);
xmlHttp.onreadystatechange = updatePage;{
if (xmlHttp.readyState==4) {
alert(xmlHttp.responseText)
}
}
xmlHttp.send(null)
}
function updatePage(){
//4 sorun yoksa demek
if(xmlHttp.readyState == 4){
//gelen cevap
var response = xmlHttp.responseText;
//hangi div gelcekse buraya yazılcak
TICKER.innerHTML = response;
//500 milisaniyede bir fonksiyonu cağirir
setTimeout('callServer()',5000);
}
}
callServer('url');
</script>
</head>
<div STYLE="display:none; border-top:1px solid #CCCCCC; border-bottom:1px solid #CCCCCC; overflow:hidden; background-color:#FFFFFF; width:620px" onmouseover="TICKER_PAUSED=true" onmouseout="TICKER_PAUSED=false" id="TICKER">DSADADA</div>

<script type="text/javascript" src="webticker_lib.js" language="javascript"></script>

</html>

When TICKER DIV is updated, the news bar starts not ticking in Firefox. In Internet Explorer, TICKER DIV is sometimes updating, sometimes not. How can we fix this problem? Thank you,

Richy
05-05-2009, 06:47 PM
Also, this is the content of webticker_lib.js;

TICKER_CONTENT = document.getElementById("TICKER").innerHTML;

TICKER_RIGHTTOLEFT = false;
TICKER_SPEED = 2;
TICKER_STYLE = "font-family:Arial; font-size:12px; color:#444444";
TICKER_PAUSED = false;

ticker_start();

function ticker_start() {
var tickerSupported = false;
TICKER_WIDTH = document.getElementById("TICKER").style.width;
var img = "<img src=ticker_space.gif width="+TICKER_WIDTH+" height=0>";

// Firefox
if (navigator.userAgent.indexOf("Firefox")!=-1 || navigator.userAgent.indexOf("Safari")!=-1) {
document.getElementById("TICKER").innerHTML = "<TABLE cellspacing='0' cellpadding='0' width='100%'><TR><TD nowrap='nowrap'>"+img+"<SPAN style='"+TICKER_STYLE+"' ID='TICKER_BODY' width='100%'>&nbsp;</SPAN>"+img+"</TD></TR></TABLE>";
tickerSupported = true;
}
// IE
if (navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Opera")==-1) {
document.getElementById("TICKER").innerHTML = "<DIV nowrap='nowrap' style='width:100%;'>"+img+"<SPAN style='"+TICKER_STYLE+"' ID='TICKER_BODY' width='100%'></SPAN>"+img+"</DIV>";
tickerSupported = true;
}
if(!tickerSupported) document.getElementById("TICKER").outerHTML = ""; else {
document.getElementById("TICKER").scrollLeft = TICKER_RIGHTTOLEFT ? document.getElementById("TICKER").scrollWidth - document.getElementById("TICKER").offsetWidth : 0;
document.getElementById("TICKER_BODY").innerHTML = TICKER_CONTENT;
document.getElementById("TICKER").style.display="block";
TICKER_tick();
}
}

function TICKER_tick() {
if(!TICKER_PAUSED) document.getElementById("TICKER").scrollLeft += TICKER_SPEED * (TICKER_RIGHTTOLEFT ? -1 : 1);
if(TICKER_RIGHTTOLEFT && document.getElementById("TICKER").scrollLeft <= 0) document.getElementById("TICKER").scrollLeft = document.getElementById("TICKER").scrollWidth - document.getElementById("TICKER").offsetWidth;
if(!TICKER_RIGHTTOLEFT && document.getElementById("TICKER").scrollLeft >= document.getElementById("TICKER").scrollWidth - document.getElementById("TICKER").offsetWidth) document.getElementById("TICKER").scrollLeft = 0;
window.setTimeout("TICKER_tick()", 30);
}

Richy
05-05-2009, 08:12 PM
Hi,
I changed the code as;

if(xmlHttp.readyState == 4){
var response = xmlHttp.responseText;
TICKER.innerHTML = response;
setTimeout('callServer()',5000);
TICKER_CONTENT = document.getElementById("TICKER").innerHTML;
TICKER_RIGHTTOLEFT = false;
TICKER_SPEED = 2;
TICKER_STYLE = "font-family:Arial; font-size:12px; color:#444444";
TICKER_PAUSED = false;
ticker_start();
}

Now, the content is ticking in Firefox. However, now the text accelerates continuously :D. What's the crazy problem?

Richy
05-07-2009, 05:14 PM
Any idea ?

A1ien51
05-07-2009, 10:26 PM
store your timeout into a variable

ticktock = window.setTimeout("TICKER_tick()", 30);


and you need to cancel it when you get the Ajax call back

if(xmlHttp.readyState == 4){
var response = xmlHttp.responseText;
TICKER.innerHTML = response;
setTimeout('callServer()',5000);
TICKER_CONTENT = document.getElementById("TICKER").innerHTML;
TICKER_RIGHTTOLEFT = false;
TICKER_SPEED = 2;
TICKER_STYLE = "font-family:Arial; font-size:12px; color:#444444";
TICKER_PAUSED = false;
window.clearTimeout(ticktock);
ticker_start();
}


Eric

Richy
05-07-2009, 11:23 PM
store your timeout into a variable

ticktock = window.setTimeout("TICKER_tick()", 30);


and you need to cancel it when you get the Ajax call back

if(xmlHttp.readyState == 4){
var response = xmlHttp.responseText;
TICKER.innerHTML = response;
setTimeout('callServer()',5000);
TICKER_CONTENT = document.getElementById("TICKER").innerHTML;
TICKER_RIGHTTOLEFT = false;
TICKER_SPEED = 2;
TICKER_STYLE = "font-family:Arial; font-size:12px; color:#444444";
TICKER_PAUSED = false;
window.clearTimeout(ticktock);
ticker_start();
}


Eric

Hi,
Where can I store the variable in these codes?

A1ien51
05-07-2009, 11:37 PM
ticktock is the variable I was talking about.

Richy
05-07-2009, 11:42 PM
ticktock is the variable I was talking about.

I can't understand anything about Javascript. I tried to change;

if(xmlHttp.readyState == 4){
var response = xmlHttp.responseText;
TICKER.innerHTML = response;
setTimeout('callServer()',5000);
TICKER_CONTENT = document.getElementById("TICKER").innerHTML;
TICKER_RIGHTTOLEFT = false;
TICKER_SPEED = 2;
TICKER_STYLE = "font-family:Arial; font-size:12px; color:#444444";
TICKER_PAUSED = false;
window.clearTimeout(ticktock);
ticker_start();
}

And I added

ticktock = window.setTimeout("TICKER_tick()", 30);

in begining of the codes. Nothing changed :S..