Script Function Returning Undefined / Sort It?

Oct 20, 2010

I have a function where in I call another function that assigns a value to a var. code...

For some reason my code below is returning 'undefined'. But when I place an alert(); before the 'return' it shows the correct value. However when I place an alert(); to show the var that is set to what the function returns it says 'undefined'.

Firebug throws no errors. I am using a little bit of jQuery.

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GetElement Function Returning Undefined Value

Sep 26, 2009

Here is a clip of code from a script project im working on. Now my document.getElementsByTagName is returning a "undefined" value.

<a href="[URL]" style="text-decoration: none; color: #EDDBAF; font-size: 16px;">
<center style="margin-left: 10px; margin-right: 10px;">
<font style="color: #EDDBAF; font-size: 16px;" id="title"></font>
</center></a>
<li id="name"><a http="[URL]" style="color: blue;">John Doe</a></li>
<script type="text/javascript">
var pname = document.getElementById('name').getElementsByTagName('a');

Now if I remove the ".getElementsByTagName('a')" it will actually work, but it also includes the <a> tag thats within the <li> tag, which I don't want.
document.getElementById('title').innerHTML=pname.innerHTML;
</script>

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GetElementById Not Returning Value - Undefined

Dec 10, 2010

None of my getElementById (or other) references produce anything but "undefined." This occurs in the latest versions of Fx, IE, Chrome, and Safari, so it must be something I am doing but not not seeing here. I have boiled it down to the following without success, and wonder whether there is some add on interaction. Fx 3.6.12 has the problem with this code:
<code>
<html>
<head>
<title>This is a test of getElementById</title>
</head>
<body>
<div id="area" name="area_name">xxx</div>
<script type="text/javascript">
var divs = document.getElementsByTagName('div');
var msg = '';
msg = 'Divs[0] contains ' + divs[0] + ' with width = ' + divs[0].width + "
";
msg +='Test area width by id = ' + document.getElementById('area').width + "
";
msg +='Test area width by name = ' + document.getElementsByName('area_name').width;
alert(msg);
</script>
</body>
</html>
</code>

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Feb 20, 2009

I am working on a very simple code to determine the highest value from an array and also use parallel arrays.

The problem I am having is, when I try to invoke the parallel array namesArray it returns undefined.

I have coded the function so it can be used to find the highest value in more arrays as this is only the beginning of my code. Im not sure if this is what is causing the problems but I have a feeling it is code...

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Value In Index Of Variable Returning Undefined In Ie?

Apr 5, 2011

I have a following snippet

var test = xmlhttp.responsetext
var msg="";
when i print the text as below

[Code].....

I could see the individual values in each index in firefox, but ie is displaying as undefined.

know whether this is not allowed in IE?. Is there any workaround for this?.

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JQuery :: GetJSON Returning Undefined Instead Of XMLHttpRequest?

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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AJAX :: GetElementById Returning 'undefined' In Attempt

Sep 12, 2011

I can not for the life of me get an ajax example/tutorial to work. I have tried dozens including prototype library and JQuery.

Here is my latest attempt:

As you can see I am trying to alert the variable teamH but I keep getting an undefined in the alert. I also tried a static drop down and I received the same undefined alert.

How I get that variable to contain my drop down choice?

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JQuery :: .css() Returning Blank String In FF & Chrome But "undefined" In IE

Jul 14, 2010

Using jQuery v1.4.2, Firefox 3.6.6, Chrome 4.1, IE 6,7,8.

I'm using jQuery .css() function to get the value of the css attribute "background". The attribute has not previously been assigned a value (either in script or style sheet).

e.g. alert($(this).css("background"));

In Firefox and Chrome, the return value is an empty string (""). However in IE 6,7,8, the return value is "undefined".

It also makes the following statement impossible:

alert($(this).css("background").indexOf("somepic.gif"));

Because css() in IE doesn't return a blank string, doing indexOf() raises an error.

cross-browser scripting compatibility, for jQuery to return a blank string *for all browsers* if the css attribute isn't set. Otherwise we have to check for both "" or "undefined" which is the sort of pain jQuery users are trying to avoid.

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Function Calling Function Returning False

Jun 7, 2010

I am trying to write a function that is being invoked when some one clicks the submit button on the form.<form name="sectionA" action="optionpage.cfm" onSubmit="return abc()">I have three tables with initials textboxes. I want to check if they are empty and return false(stay on the same page), else go to action page.Here is what I am doing, I Created three functions tableA(), tableB(),tableC() call them from function abc(). These functions tableA(), tableB(), tableC() return false if one of the field is empty and stop furthur processing and remain in the same page. If none(errors), then go the other page.i.e if table B has empty fields, page should stop furthur processing and remain in the same page.Here is how I am doing it Can somebody please point out what I am doing wrong here.Even when there is empty field, the code moves me to the actionPage.

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Mar 27, 2009

The following code is supposed to return a variable containing text, currently the code posts the data but returns an "undefined" variable. Can someone tell me what's wrong? code...

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Returning Value Outside Of Function?

Mar 27, 2009

I would like to document.write the status value using the return function but I can't get it to work.

The output should be Markers On or Markers Off.

<html>
<head>
<script type="text/javascript">

[Code].....

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Function Returning Wrong Value / Why Is So?

Feb 18, 2009

Why is my function returning the wrong value??

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Why Is Function Returning False?

Aug 13, 2011

So for whatever reason the convertToArray function in the following code returns false if the argument is more than 1 character long. If it's 1 character long it just returns the character as an array with only one value.What I'm trying to do is take a string of numbers, plus signs, and minus signs and convert it to an array.

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Nov 3, 2005

I have a little problem in one of my functions, I would like to pass in a form field name and set the value to something that is passed in. here is my code:

function pickitem(id,type){
opener.document.getElementById("form").type.value = id;
window.close()
}

so i'm passing in an id and a formfield e.g. txtName The problem is with the type.value - i haven't touched javascript for ages so i'm really rusty!!

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Dec 1, 2009

I'm attempting to simplify my javascript code when it comes to ajax, but afterwords it only prints 'undefined' to the screen rather than what I want it to print.

I want to be able to put something like this on my main page onclick="document.getElementById('output').innerHTML = print_output();" where print_output() is the ajax function. This way I don't have to use a function to assign values directly to innerHTML and I don't have to muck about with a js file whenever I want to change my page layout.

To do this, I created a recursive function:

function print_output(return_value) {

if a value has been passed to the function, simply return it
if(return_value || return_value == 0) {
return return_value;
}

[Code].....

but like I said, it prints 'undefined' out to the screen. Why isn't this printing the contents that it receives from 'index.php' like it's supposed to?

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Returning Variable From Within Nested Function

Mar 9, 2009

The code is below but basically I have two global variables, then I have a function and then a function within that, I am simply trying to update these global variables from within the nested function so i can then go on and use them in another function! this sounds like quite a straight forward request to me, but maybe it can not be done? When I do an alert on the variables (after I have apparently updated their values) I get 'undefined'!

Code JavaScript:
var resultLatB;
var resultLngB;
function getLatLngFromTown(town, callbackFunction) {
var localSearchB = new GlocalSearch();
localSearchB.setSearchCompleteCallback(null,
function() {
if (localSearchB.results[0]){
resultLatB = localSearchB.results[0].lat;
resultLngB = localSearchB.results[0].lng;
pointA = resultLatB;
pointB = resultLngB;

//THIS WORKS
alert("Test 1 = " + resultLatB);
alert("Test 1 = " + resultLngB);
}});
localSearchB.execute(town + ", UK");
//DOESN'T WORK... SHOULD IT?
alert("Test 2 = " + resultLatB);
alert("Test 2 = " + resultLngB);
}
getLatLngFromTown("oxfordshire",null);

//I WANT THIS TO WORK!
alert("Test 3 = " + resultLatB);
alert("Test 3 = " + resultLngB);

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Returning ResponseXML, Set Within An Anonymous Function, Only Once ReadyState = 4

Dec 4, 2006

I have several functions with code along the lines of:

var xmlDoc = requestXML("ajax.asp?SP=SelectRelatedTags&tag=" +
array[i]);

The requestXML() function includes the code:

var xmlDoc = null;
http_request.onreadystatechange = function() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
xmlDoc = http_request.responseXML;
} else {
alert('There was a problem with the request.' +
http_request.status);
}}};
http_request.open('GET', url, true);
http_request.send(null);
return xmlDoc;

However, the last line (the return) executes before the readyState
reaches 4. How do I return the xmlDoc to the functions only once the
xmlDoc has been assigned? I tried putting the return statement in a
while loop with the condition that the readyState must = 4 - this
worked, but makes the browser popup a message saying the script is
slowing down the system.

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Jun 3, 2010

I know this is a simple question with a simple answer, but I can't seem to wrap my brain around it.Sorry for the infantile nature of this post. Anyhow, I am making an AJAX call via JQuery and need the function to return a value from a calling function, like so:

[Code]...

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May 26, 2010

I have a weird bug that's occuring in pretty much all the browsers. If I close the tab, and then hit Ctrl -> Shift -> T to bring it back the width() method returns 0 on an appended image instead of what the image actually is. Hitting refresh on the tab removes this bug and everything works fine. I will also say that trying
.css('width') and
document.getElementById('divShadowLeft');
Both also return 0 for this bug.

I can't show all the code for security reasons, but I'll just outright ask.. what are the reasons that width() would return 0 on an image? I've checked to make sure that it was visible (both display and visibility properties), and I checked the length of the property to ensure it was there. I just can't figure out why width() is returning 0.

Here's a code snippet:
$(this).append('<img src="'+defaults["imagePath"]+defaults["imageLeft"]+'" alt="" id="'+defaults["imageClass"]+'Left" class="'+defaults["imageClass"]+'" style="" />');
alert('Length: '+$('#divShadowLeft').length+' | Width: '+$('#divShadowLeft').width()+' | Visible: '+$('#divShadowLeft').css('visibility'));

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Apr 23, 2010

I have a setup where I have a function, calling a function, calling a function. All functions do what they're supposed to do, but they don't return to the first function when all is done, so it doesn't display an alert that it's supposed to.

For those that don't want to look through tons of code and think they might know what I'm doing wrong, here's the "coles notes" version. code...

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Apr 23, 2010

I am wondering how can I return the variable senttext from the function below?I have declared it and when I alert(senttext) below it appears as I want it but I need to return it and pass it to another function. When I change alert() to return the variable becomes undefined?

var senttext;
function getData()
{
if (window.XMLHttpRequest) {

[code]...

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Mar 26, 2011

I have this code:

HTML Code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>

[code]....

The practical scenario is I have several functions attached to the jQuery ajaxSucess event. Each function needs to execute once during initial load and after when the JQuery ajaxSuccess event is fired. So I am just looking to see if I can eliminate a a few lines of code and learn something new in the process, that is really all.

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Jun 9, 2009

OK so Ive been using jquery for a little bit now and love it. I am a ColdFusion developer. I have a need where I would like to present the user with a list of categories and the user can drag and drop to sort, but then I need to post this new sort order to the database. So I see there are a ton of cool drag & drop plugins for jquery. I understand how they work and I can get it to work as far as spitting out DIVS or spitting out ULs that can be sorted, but then what? So now they are sorted on my screen and not really part of the form. How do I translate that into something I can do a post to the database with? Do I do an AJAX call every time they drop an item and try to extrapolate the sort order on that item after they drop it? Do I populate a hidden form field with the constantly updating sort order list? MAybe a list of ID's? How does everyone else go about this this task? I'm sure there is more than one way and I'm sure this is a common task.

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Aug 5, 2009

I have a very simple PHP script that returns JSON like this:
{"question":"What day is it?"}

And I'm trying to call it from another page using Ajax. My code looks like this:
var url = "/test.php";
$.get(url,
function(data){
$.each(data, function(i, value) {
alert(value);
}, "json"
);
});

When I run it I get each character printed out one at a time in a separate alert. And then when I used this line of code:
alert(typeof data);
It tells me that 'data' is a string. Shouldn't it be a JSON object?

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Jan 11, 2012

The event which in the following keydown function code is not returning the correct key codes. I have checked this in Chrome using the developer tools and the console.log(e.which) statement in my code.

var KEY = {
UP: 38,
DOWN: 40,
W: 87,

[Code]....

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Apr 18, 2011

I've written the following small feature test.

[Code].....

I want to remove 'div' before returning the function. Testing in IE something like div.parentNode.removeChild(div); will fail. If I look in the dom 'div's parentNode is null, so that explains that. It needs to be appended to something first I guess.

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