Develop Reference

Ajax function in javascript is not working in mozilla firefox browser, why?

Follownig is my javascript code, ajax function is used to read response from
server. but xmlhttp.status is always 0 in firefox browser, why? please help me.
function ajaxAsyncRequest() {
var xmlhttp;
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveObject("Microsoft.XMLHTTP");
}
//creating asynchrounous GET request
var tempValUrl = $(".urlVal").val();
var urls = tempValUrl + '/Department/departmentAdminTokenReceive';
xmlhttp.open("GET", urls, true);
xmlhttp.send();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
alert("readyState"+xmlhttp.readyState);
alert("status"+xmlhttp.status);
if (xmlhttp.status == 200) {
var data = xmlhttp.responseText;
//for signing
var signarr = data.split("$$");
//for signing
document.getElementById('signName').value = signarr[1];
document.getElementById('signCertName').value = signarr[2];
document.getElementById('signCa').value = signarr[3];
document.getElementById('signExpiryDate').value = signarr[4];
document.getElementById('signPublicKey').value = signarr[5];
}
}
}
}

Loop Calling Function in Native Ajax

Here's my native ajax code:
function script_grabbed(str) {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("numvalue").value = xmlhttp.responseText;
var result = document.getElementById("numvalue").value;
if (typeof result !== 'undefined'){
alert('Data Found:' + result);
//start: new request data for #valdata
xmlhttp.open("POST", "inc.php?q="+str, true);
document.getElementById("valdata").value = xmlhttp.responseText;
xmlhttp.send(null);
var dataval = document.getElementById("valdata").value;
if (typeof dataval !== 'undefined'){
alert('Data Bound:' + dataval);
//continue to call maps
script_dkill()
}
//end: new request data for #valdata
}
}
}
xmlhttp.open("POST", "inc_num.php?q="+str, true);
xmlhttp.send(null);
}
From the code, let me explain that:
I want to get data/value from result and dataval. After I get the data, I execute script_dkill() function.
However, It creates loop and never get to script_dkill.
So, the question is: How to get to script_dkill and execute it?
For example:
The script_dkill() has content as follow:
function script_dkill(){
alert('Hallo, you call me!');
}
Any help, please...

You need to use a different XMLHttpRequest object for the second request, since you are using the same object it will call the same onreadystatechange event again and again
function script_grabbed(str) {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("numvalue").value = xmlhttp.responseText;
var result = document.getElementById("numvalue").value;
if (typeof result !== 'undefined') {
alert('Data Found:' + result);
//start: new request data for #valdata
var xmlhttp2 = new XMLHttpRequest();
xmlhttp2.onreadystatechange = function() {
if (xmlhttp2.readyState == 4 && xmlhttp2.status == 200) {
document.getElementById("valdata").value = xmlhttp2.responseText;
var dataval = document.getElementById("valdata").value;
if (typeof dataval !== 'undefined') {
alert('Data Bound:' + dataval);
//continue to call maps
script_dkill()
}
}
}
xmlhttp2.open("POST", "inc.php?q=" + str, true);
xmlhttp2.send(null);
//end: new request data for #valdata
}
}
}
xmlhttp.open("POST", "inc_num.php?q=" + str, true);
xmlhttp.send(null);
}

Why is array.length returning me wrong number?

This is my javascript code in which I am calling a php file each 5 seconds ,the php file returns some id's in form of javascript array but array.length is giving me 18 while there are only 2 elements in the array.
PHP file response:
["20","1"]
//function to rotate thumbnails
window.setInterval(function () {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
var index;
var a = xmlhttp.responseText;
for (index = 0; index < a.length; index++) {
pass_value_to_other_function(a[index]);
}
}
}
xmlhttp.open("GET", "thumb_rotator.php", true);
xmlhttp.send();
}, 5000);

You need to parse the response to a javascript Object/Array.
var a = JSON.parse(xmlhttp.responseText);

update ajax send() content

I'm trying to receive data from ajax call and then send this data back using ajax.
javascript code:setInterval (function ()
{
var xmlhttp = new XMLHttpRequest();
var content = "data=1";
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
content = "data=" + xmlhttp.responseText;
alert (xmlhttp.responseText);
}
}
xmlhttp.open("POST" , "execute-page.php" , true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send(content);
},5000);
the problem now is that it keeps sending the old content. how can I update content variable with ajax response text?

Move the line var content = "data=1"; out of the function:
var content = "data=1";
setInterval (function ()
{
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function()
{
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
content = "data=" + xmlhttp.responseText;
alert (xmlhttp.responseText);
}
}
xmlhttp.open("POST" , "execute-page.php" , true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send(content);
},5000);

JS file works fine on IE but not on other browsers

The function below gets results in ie but not on the other browsers. Any suggestion?
function show_packet(str, company) {
var cam = document.getElementById("company");
if (window.XMLHttpRequest) {
var xmlhttp = new XMLHttpRequest();
} else {
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
document.getElementById("packet_1").innerHTML = xmlhttp.responseText;
document.getElementById("icon_1").innerHTML = "";
}
}
xmlhttp.open("GET", "show_packet.php?car_moto=" + encodeURIComponent(str, true) + "&cam=" + encodeURIComponent(cam.value, true));
xmlhttp.send();
}

vars and functions are hoisted to the top of their containing function. Declare your var once at the top, and only assign it in the if/else.