JQuery :: For In Loop - Alert Box Says Undefined
Oct 31, 2009
I am just trying to figure out how to do some different things with the for...in loop and jQuery, but now I'm wondering if this is even possible. I made a simple example to test:
function tellMeHeights(){
var allDivs = $.makeArray('div')
for (mydiv in allDivs){
height = $(mydiv).css('height')
alert(height)
}}
But this doesn't work - the alert box just says 'undefined'. Is it possible to iterate jQuery objects like this, or should I be using something else like .each?
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Oct 27, 2011
Getting undefined alert.[code]...
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Jun 2, 2009
I have some problems about using jcarousel library on Google Map, and following is my scenario: there is a Marker on the Map, and when clicking on the Marker,Info-Window will pop up, and jcarousel content will be in the Info- Window And This is a simple demo:
[Code]...
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Jun 7, 2009
I have a problem that 'test' is not passed. The following function alert undefined, but it should alert test. Why that?
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Nov 14, 2011
Have searched this forum thoroughly as well as googled it, but no luck in understanding why the following simple code does not work:
Code:
function changeSelect(){
var id = $(this).attr("id");
[code].....
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Dec 9, 2011
this is a homework project which kind of works but isn't perfect. My tutor said the result must be an alert but I ended up with a document.write instead.He said it was fine but I'd like to know how to make it alert the result if anyone can help.FWIW I tried making the contents of the for loop into a variable without success.
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May 14, 2010
I had some code that kept repeating itself over and over again, with the only variance being some named elements changing. All the named elements ended in a sequential number, so I figured I'd just put one of the repeating blocks into a "for" loop and then make that sequential number at the end of the named elements into the variable in the loop. Again, the code worked fine when copied/pasted over and over, but now it doesn't do anything. Here's one of the code snippets outside of the loop (which worked):
Code:
$(document).ready(function () {
$("#SelectDiv1").change(function() {
if ($("#DD1").val() != "0") {
$('#SelectDiv2').hide();
$('#SelectDiv3').hide();
$('#SelectDiv4').hide();
$('#SelectDiv2').show();
$.ajax({ .....
You can see there's an "alert" as the first part of the loop. That "alert" never shows up. However, if you comment out everything in the loop after the "alert", then the "alert" works. So something else in that loop is causing the whole thing to not work. I find it odd that the first "alert" wouldn't work, though, since it should be the first thing that happens before any of the other code is executed in the loop, right???
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Oct 21, 2011
heres my code:
Code:
<script language="JavaScript">
var checkobj
function agreesubmit(el){[code]....
i need to make it like if the button is clicked and there the agreement checkbox is not checked.. it should give an alert that the alert is not checked.. i know that would require a if and else statement but i cant figure out how to do it
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Nov 13, 2010
i am facing a problem after using jquery jconfirm alert. Issue is that after receiving confirm alert, when user press tab to go on Cancel button and press Enter key there, despite of firing event of Cancel button, it fires the event of OK button. this issue is not produced when user press the cancel button by mouse. Waiting for your replies.
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Feb 16, 2011
I am trying to throw an alert with the attributes of a submit button in the alert.
What am I doing wrong?
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Jul 29, 2011
I have the code below, how could it be modified to loop over and over and reload the xml file each time. Flow would be: load xml, run thruogh code to display each xml node one at a time, when reach last node, start all over, reloading xml file,
[Code]...
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Jun 10, 2010
jquery code:
$.ajax({
url: "validate_livestock_form/index/",
type: 'POST',
dataType: "json",
data: form_data,
success: function(data) {
alert(data);
[Code]...
php page is echoing out:{"species":"Please select a species!"} I double checked the response from the php and firebug shows the same. On success alert is not alerting the JSON data instead, I'm receiving [object Object]. Why is that and how do what should I do to fix this?
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Jan 22, 2011
I have been looking at this code for two evenings now, and rewrote it 4 times already. It started out as jQuery code and now it's just concatenating strings together.
What I'm trying to do: Build a menu/outline using unordered lists from a multidimensional array.
What is happening: Inside the buildMenuHTML function, if I call buildMenuHTML, the for loop only happens once (i.e. only for 'i' having a value of '0'.) If I comment out the call to itself, it goes through the for loop all 3 times, but obviously the submenus are not created.
Here is the test object:
test = [
{
"name" : "Menu 1",
"url" : "menu1.html",
"submenu" : [
[Code].....
'Menu 2' and 'Menu 3' don't show up! I'm sure it's something small that I'm overlooking.
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Aug 4, 2011
I'm looking to send a loop variable (i) to a function inside the loop, but I can't seem to get it to use the value I want, it keeps making it a reference of i and therefore the function is always called using the last value of i rather than the one it was set with.
So if i have 5 Tabs then Tab 1, when clicked, should call DefaultTabClick(0) and so on rather than always using 4 for any of the tabs.
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Mar 6, 2011
As you can see from the code and the output, it will attempt to write to the browser how many moves, but only '0'.
function rollDie()
{
return Math.floor(Math.random() * 6) + 1;
}
/*
*searches for a number in a number array.
*
*function takes two arguments[CODE]...
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Jul 10, 2009
I'm currently working on MySQL/PHP/JavaScript project using AJAX. I came across some weird abnormality .for some reason alert(textarea2); shows nothing but if I place another alert(textarea2); right after the first one it works, second pop-up contains responseText....also I've tried alert(resp.responseText); it worked fine,
new Ajax.Request("categories-inset.php",
{
method: 'get', [code]....
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Aug 4, 2010
I have a suggestion based on the assumption, which I think is correct but feel free to prove me wrong, that the .attr() method returns "undefined" in two different cases:1) when the attribute is actually not present in the dom element2) when it is present but it has no value, think for example <input type="text" disabled/> which I not is not standard HTML but I've seen it pretty often...wouldn't it be better to return undefined only in the first case, and return null in the second case? In this way, it'd be clear that the attribute is set but no value is specified.
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Oct 29, 2011
Im trying to get my first snippet of code to work from Chap 1 of head first jQuery.
The error reports $ is undefined.
My code...
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Jun 19, 2009
I am not able to install JQuery , While installing I have following error -
Error : 'document' is undefined
Line : 12.
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Aug 11, 2010
I try to usejQuery( html, [ ownerDocument ] ) to create a element and get the jquery object.
var $list = $('<ul class="list">');
console.log($list.context); // return undefined
$('body').append($list);
[code]....
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Feb 25, 2010
I'm doing something with grails + jquery. My controller send a rendered json (which I know is sending correctly) but when the object "arrives" in the callback method it comes undefined. I can see it lenght, but not it's content.
[Code]...
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May 23, 2010
I don't know the reason of getting the message as 'undefined' in alert dialog box, whenever I do the post request to servlets from jquery after clicking login button.Here's the code which's making me bugged:
$.post("Check.do", $('#form').serialize(),
function(data){
alert(data.message); //displaying undefined
});
}
the request is passing to servlets(which is mapped to Check.do URL), and in doPost method in servlets I'm just doing: response().getWriter().write("Hello");May I know the what's the reason of getting error in above code, and how can I sort this problem out?
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Aug 11, 2009
I receive an error: 'document' is undefined, when I try to run the jquery download.
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Sep 19, 2009
I am using getJSON to get results from a different domain and i wantedto get _some_ object back when calling getJSON so that i can insertsome variables into the callback scope.Basically, what i wanted to do was this:
var new_json = $.getJSON(url, function(data) {
alert
(this.variable_from_caller);
[code]....
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Jun 22, 2009
I am just trying to learn a little bit about jQuery.Now I have a problem with returning a value from a function.The following code works fine, when I tested it with alert(price) or any other way of echoing the value directly. But if I try something like var test = getPrice(324), the variable test would always be undefined.
function getPrice(id)
{
$.get('db.xml', function(d){[code]....
I assume that the nested functions are part of the problem,
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May 18, 2009
I have to use scrollTop and scrollHeight properties, but on jQuery object it returns `undefined`.
Is there any method to get this property from jq object?
It doesn't matter, but my object looks like this:
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