We Keep Coding

how do i save my login details and redirect page properly?

** i am trying to do save login details and it works but when signin(true) fuction called page get reload infinity times **
signin(true)
// doing sign in
function onlogin(dataResult, is_check_login) {
$("#preloader").show();
var dataResult = JSON.parse(dataResult);
if (dataResult.statusCode == 200) {
$("#preloader").hide();
var signedin_user_id = dataResult.row_id;
// open dashboard if already logged in
window.location.href = '../page/index.html';
document.getElementById("dashboard_name").innerHTML = dataResult.name;
} else if (dataResult.statusCode == 201) {
$("#preloader").hide();
if (is_check_login) {
//open sign in form if not logged in
window.location.href = '../page/signin.html';
} else {
$("#preloader").hide();
console.log('invalid login');
}
}
}
function sign_in(is_check_login = false) {
var signin_email = $('#signin_email').val();
var signin_password = $('#signin_password').val();
if (is_check_login || (signin_email != "" && signin_password != "")) {
$.ajax({
url: `https://www.name.com/page/php/${is_check_login ? "checklogin" : "login"}.php`,
type: "POST",
data: {
signin_email: signin_email,
signin_password: signin_password
},
cache: false,
success: function (result) {
onlogin(result, is_check_login);
}
});
} else {
alert('Please fill all the field !');
}
}

rerturning response of an ajax post

i am trying to check if an email exists in the db but the function doesn't return a value.
This is the code:
function checkemail(email)
{
var returnVal = "";
if (email.indexOf("#") != -1 && email.indexOf(".") != -1)
{
$.post( "registreren.php?email=" + email, function( response ) {
if(response == 1) { returnVal = 1; }
if(response == 2) { returnVal = 2; }
});
}
else
{
returnVal = 3;
}//email
return returnVal;
}
EDIT: email is send as a string

I short, You can not return values from ajax calls as it is asynchronous by nature, the statement return value executes before
To address such cases, use callback, a function accepted as argument and which is executed when response is been received (when asynchronous action is completed).
Try this:
function checkemail(email, callback) {
var returnVal = "";
if (email.indexOf("#") != -1 && email.indexOf(".") != -1) {
$.post("registreren.php?email=" + email, function(response) {
callback(response);
});
} else {
callback(3);
}
}
checkemail('abc#xyz.com', function(val) {
alert(val);
});
checkemail('INVALID_EMAIL', function(val) {
alert(val);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

Can you use something simple like below
$.ajax({
url: 'registreren.php',
type: 'post',
dataType: "json",
data: {'email': email},
success: function (response) {
if (response == 1)
{
returnVal = 1;
}
else
{
returnVal = 3;
}
}
});
instead of
$.post( "registreren.php?email=" + email, function( response ) {
if(response == 1) { returnVal = 1; }
if(response == 2) { returnVal = 2; }
});

Ajax call at last

in my jquery function i have two ajax call with serverside method and its working fine,
problem is ajax call at last amd after ajax line of code run but this lines of code depand on
function Rbook(b) {
var one = $(b).attr("data-oneislcc");
var two = $(b).attr("data-twoislcc");
var trip1 = $(b).attr("data-oneinfo");
var trip2 = $(b).attr("data-twoinfo");
var owflt = "l";
var inflt = 'r';
var owjdata = $(b).attr("data-ow");
var iwjdata = $(b).attr("data-iw");
var llccreturn, rlccreturn;
var lres, rres;
$("#fadeing").css("display", "block");
$("#fade").css("display", "block").css("height", $(document).height / 2);
if (one == 'true') {
$.ajax({
type: "POST",
url: "Search-RoundResult.aspx/FareQuoteMethod",
data: "{'ALcode':'" + trip1 + "','flt':'" + owflt + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function OnSuccess(response) {
if (response.d != null) {
lres = response.d;
if (response.d == "sessionExpire") {
}
else {
var data = new Array()
data = response.d.split("oldfare=");
llccreturn = owlcc(data[0], data[1])
}
}
else {
alert("Please Try agian.");
}
},
Error: function errer(msg) {
$("#fade").css("display", "none");
$("#light").css("display", "none");
alert(msg.d)
}
});
}
else {
llccreturn = ownonlcc(owjdata);
}
if (two == 'true') {
$.ajax({
type: "POST",
url: "Search-RoundResult.aspx/FareQuoteMethod",
data: "{'ALcode':'" + trip2 + "','flt':'" + inflt + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function OnSuccess(response) {
if (response.d != null) {
if (rres == "sessionExpire") {
}
else {
var data = new Array()
data = response.d.split("oldfare=");
rlccreturn = iwlcc(data[0], data[1])
}
}
else {
alert("Please Try agian.");
}
},
Error: function errer(msg) {
$("#fade").css("display", "none");
$("#light").css("display", "none");
alert(msg.d)
}
});
}
else {
rlccreturn = iwnonlcc(iwjdata);
}
if (llccreturn == 'farechange' || rlccreturn == 'farechange') {
$("#farechange").css("display", "block");
$("#fade").css("display", "block");
}
if (llccreturn == 'nofarechange' || rlccreturn == 'nofarechange') {
window.location = "reviewbooking.aspx?trip1=" + $(b).attr("data-oneinfo") + "&iwlcc=" + $(b).attr("data-oneislcc") + "&trip2=" + $(b).attr("data-twoinfo") + "&owlcc=" + $(b).attr("data-twoislcc");
}}
var owlcc = function (jdata, oldfare) {
//Some Calulation
retrun 'farechange';
}
var ownonlcc = function (jdata) { //Some Calulation
retrun 'nofarechange'}
var iwlcc = function (jdata, oldfare) { //Some Calulation
return 'farechange'}
var iwnonlcc = function (jdata) { retrun 'nofarechange'}
if run this code its run this line of code then rest so condition not validate
i dont know where i m doing wrong
if (llccreturn == 'farechange' || rlccreturn == 'farechange') {
$("#farechange").css("display", "block");
$("#fade").css("display", "block");
}
if (llccreturn == 'nofarechange' || rlccreturn == 'nofarechange') {
window.location = "reviewbooking.aspx?trip1=" + $(b).attr("data-oneinfo") + "&iwlcc=" + $(b).attr("data-oneislcc") + "&trip2=" + $(b).attr("data-twoinfo") + "&owlcc=" + $(b).attr("data-twoislcc");
}

It looks like you don't understand asynchronous javascript. When you do an ajax call, it sends the request, then continues running the code and only later runs the success handler. Otherwise, it wouldn't be able to do anything at all until the response came back, since javascript is single-threaded.
The Rbook function does the following: First, get lots of information from the DOM; then, send some ajax requests (and set handlers to run when the response comes back); then possibly make some changes to the DOM, depending on the values of llccreturn and rlccreturn (but they're still undefined). It's only when the ajax response comes back and the success handler is run that these variables are set, but by then it's too late.
If you want to run some code after hearing the ajax response, put it in the success handler (or call it from the success handler). In this case, it's further complicated by the fact that you don't want to run the code until both ajax responses have arrived, and also by the fact that you might just run iwnonlcc or ownonlcc synchronously instead of doing an ajax call. I'd say the easiest way to fix this would be to wrap the code you want to run at the end inside a function and an if block like this:
function dataWasReceived() {
if (llccreturn !== undefined && rlccreturn !== undefined) {
if (llccreturn == 'farechange' || rlccreturn == 'farechange') {
$("#farechange").css("display", "block");
$("#fade").css("display", "block");
}
if (llccreturn == 'nofarechange' || rlccreturn == 'nofarechange') {
window.location = "reviewbooking.aspx?trip1=" + $(b).attr("data-oneinfo") + "&iwlcc=" + $(b).attr("data-oneislcc") + "&trip2=" + $(b).attr("data-twoinfo") + "&owlcc=" + $(b).attr("data-twoislcc");
}
}
}
Then, every time you set the value of llccreturn or rlccreturn, call this function:
rlccreturn = iwlcc(data[0], data[1])
dataWasReceived();
and:
rlccreturn = iwnonlcc(iwjdata);
dataWasReceived();
etc.
I'm also concerned about this line (appears twice):
data: "{'ALcode':'" + trip2 + "','flt':'" + inflt + "'}",
You probably wanted to apply the argument as an object, not a JSON string representing that object:
data: {ALcode: trip2, flt: inflt},
(Incidentally, the string you gave wasn't valid JSON anyway, since it used ' instead of ".)

Javascript does user exists, returning value from ajax to late?

I have a script that tells a visitor if the username is already exist or not before he can proceed,
Below you see a part of my code;
EDIT: Ok I have read what you guys said, and modified it, but I still dont get it to work :S, my teacher doesn't know it either...
<script type="text/javascript">
jQuery(document).ready(function(){
// Smart Wizard
jQuery('#wizard').smartWizard({onFinish: onFinishCallback, onLeaveStep: onNextStep});
function onNextStep(){
validateSteps(function (next) { return next; });
}
function onFinishCallback(){
alert('Finish Clicked');
}
function UsernameExist(fullname, callback)
{
    var data = 'user='+ fullname;
    if(fullname) {
        $.ajax({
            type: "POST",
            url: "user_check.php",
            data: data,
async: false,
            beforeSend: function(html) {
                $("#msg_lastname").html('');
            },
            success: function(html){
                $("#msg_lastname").show();
                 $("#msg_lastname").append(html);
if(html.search("red") != -1)
{
callback(false);
}
else
{
callback(true);
}
            }
        });
}
}
function validateSteps(callback){
var isStepValid = true;
// validate step 1
var firstname = $('#firstname').val();
if(!firstname || (firstname.length < 3 || firstname.length > 10))
{
$('#msg_firstname').html('<br/><font color="red">Enter a first name, between 3 and 10 letters.</font>').show();
isStepValid = false;
}
else
{
$('#msg_firstname').html('').hide();
}
var lastname = $('#lastname').val();
if(!lastname || (lastname.length < 3 || lastname.length > 14))
{
$('#msg_lastname').html('<br/><font color="red">Enter a last name, between 3 and 14 letters.</font>').show();
isStepValid = false;
}
else
{
$('#msg_lastname').html('').hide();
}
var gender = $('#gender').val();
if(!gender || Number(gender) == -1)
{
$('#msg_gender').html('<br/><font color="red">Choose your gender!</font>').show();
isStepValid = false;
}
else
{
$('#msg_gender').html('').hide();
}
var age = $('#age').val();
if(!age || Number(age) > 90 || Number(age) < 21)
{
$('#msg_age').html('<br/><font color="red">Enter a age between 21 and 90.</font>').show();
isStepValid = false;
}
else
{
$('#msg_age').html('').hide();
}
var pin = $('#pin').val();
if(!pin || pin.length > 10 || pin.length < 4)
{
$('#msg_pin').html('<br/><font color="red">Enter a PIN between 4 and 10 numbers.</font>').show();
isStepValid = false;
}
else
{
$('#msg_pin').html('').hide();
}
if (isStepValid) {
UsernameExist(firstname + ' ' + lastname, function (exists) {
callback( exists );
});
} else {
callback( false );
}
}
jQuery('select, input:checkbox').uniform();
});
</script>
Now the problem is that when I run this script, it returns undefined, I guess because the UsernameExist is not done fast enough, and it seems the return UsernameExist is not waiting for it for some reason...

You are returning UsernameExists before it has been run.
Instead, call UsernameExists like this:
if (isStepValid) {
UsernameExist(firstname + ' ' + lastname, function (exists) {
return exists;
});
} else {
return false;
}
This works because UsernameExists expects a callback function and on success passes either true or false to callback().

you need just to set async option as false
function UsernameExist(fullname, callback) {
var data = 'user=' + fullname;
if (fullname) {
$.ajax({
type: "POST",
url: "user_check.php",
data: data,
async: false,
beforeSend: function (html) {
$("#msg_lastname").html('');
},
success: function (html) {
//your code after success
}
});
}
}
from jQuery documentation jQuery.ajax
If you need synchronous requests, set this option to false
so you need to execute your ajax call and wait until it's completely finish to execute what you want based on the result

Maybe you should call UsernameExist(fullname, callback) after jQuery load complete.
try this :
getScript('http://code.jquery.com/jquery-1.9.1.min.js', function () {UsernameExist(fullname, callback)});
function getScript(url, callback) {
var script;
script = document.createElement("script");
script.setAttribute('language', 'javascript');
script.setAttribute('type', 'text/javascript');
script.setAttribute('src', url);
var done = false;
vObj = script.onload;
script.onload = script.onreadystatechange = function () {
if (!done && (!this.readyState ||
this.readyState == "loaded" || this.readyState == "complete")) {
done = true;
if (typeof callback === 'function')
callback(this.ownerDocument.attributes);
}
};
var head = document.getElementsByTagName('head')[0];
head.appendChild(script);}

Try something like this :
// Smart Wizard
$('#wizard').smartWizard({onFinish: onFinishCallback, onLeaveStep: onNextStep});
function onNextStep() {
var isValid = validateSteps();
alert(isValid);
}
function onFinishCallback(){
alert('Finish Clicked');
}
function UsernameExist(fullname)
{
var data = 'user='+ fullname;
var userAlreadyExists = null;
if(fullname) {
$.ajax({
type: "POST",
url: "user_check.php",
data: data,
async: false,
beforeSend: function(html) {
$("#msg_lastname").html('');
},
success: function(html){
$("#msg_lastname").show();
$("#msg_lastname").append(html);
if(html.search("red") != -1)
{
userAlreadyExists = false;
}
else
{
userAlreadyExists = true;
}
}
});
}
return userAlreadyExists;
}
function validateSteps(){
...
if (isStepValid) {
return UsernameExist(firstname + ' ' + lastname);
} else {
return false;
}
}

confirm box from a controller

Have a requirement to call the confirm box in JSP, following is my code in controller,
if(!(nesting)){
bla.add("Do you want to Load anyway?");
context.getFlowScope().put("bla", bla);
context.getFlowScope().put("uldSelector", uldSelector);
return;
}
h = uloService.processDomBatch(histInfo, dl, items);
the above will add the error to flowscope and returns, but, I wantto call a confirm box instead and then depending yes/no, I should continue through...
is there a way to do this?..any help is greatly appreciated!
Thank you!

Yes #user1609085 you can do it with AJAX and JavaScript something like this:
function question(val) {
var chk = document.forms[0].chk
var box = valBox(chk)
var resp = confirm("Do you want to Load anyway?")
if(resp) {
if(box == null) { return }
else {
$.ajax({
type: 'GET',
url: 'controllerMethod?action=controllerMethod',
data: 'uldSelector='+val,
cache: false,
success: function(data) {
alert("histInfo")
},
error: function(data) {
alert('ERROR: ' + data)
}
})
}
}
}
function valBox(b) {
var cnt = -1
for(var i = b.length-1; i > -1; i--) {
if(b[i].checked) {
cnt = i
i = -1
}
}
if(cnt > -1) return b[cnt].value
else return null
}
And you box only put onclick="question(this.value)"
I hope help you :)