Members Of The Error Class/object

Apr 18, 2006

What're the members of the error class/object? Is there a complete reference to all JavaScript objects available on the Web?

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Object Members That Are Prototyped As Arrays Become Shared By All Class Instances?

Dec 12, 2010

Has anyone noticed this behavior before? This really threw me off... I would have expected prototyped arrays to be private to each class instance rather than shared between all class instances.

HTML Code:
<html>
<head>
<script type="text/javascript">

[Code]....

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Storing Element References As Public Object Members

Sep 20, 2006

I've spent several days trying to work this out. Maybe I'm just
searching for the wrong keywords/phrases.

I have some code that looks like:

[-- snippet starts --]
Console = new Object();
Console.init = function() {
this.STDIN = document.getElementById('console0_stdin');
this.STDOUT = document.getElementById('console0_stdout');

// set styles on the element references, eg:
this.STDIN.style.width = `%'
this.STDOUT.style.width = `%'
}

Console.focus = function() {
this.STDIN.focus();
}

Console.writeln = function(buffer) {
this.STDOUT.value += "
" + buffer;
}

[-- snippet ends --]

I'm not sure why, but the Console.focus() and Console.writeln() methods
just don't seem to be able to use the DOM references stored in
Console.STDIN and Console.STDOUT. Everything's fine in the
constructor, but other methods can't seem to use them.

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Protected Static Members, Abstract Classes, Object Composition Vs. Subclassing

Nov 26, 2005

I've recently been following the object-oriented techiques discussed
here and have been testing them for use in a web application. There is
problem that I'd like to discuss with you experts.

I would like to produce Javascript classes that can be "subclassed"
with certain behaviors defined at subclass time. There are plenty of
ways to do this through prototyping and other techniques, but these
behaviors need to be static and protected. By protected this means
that they can be overridden (or reassigned) in subclasses, and
privileged subclass methods can access them, but callers external to
the class cannot.

I've been attempting to define a factory function that transfers its
parameters to an anonymous object while defining the constructor in a
-with- block. (This is what I'm loosely referring to as "subclassing"
- it's really object composition.) This works, but not for
externally-defined functions. They can't see the protected static
members....

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Submission Error In IE - Object Expected Or Object Is Null Or Undefined

Oct 15, 2009

I have come across an issue that only happens with IE.I have a custom save function that is designed to handle different ajax submits but I will simplify it for debugging. The issue is that once I make a submit everthing is fine at first. Then once I try to submit a second time it craps out. I am checking to see if there is an onsubmit function and then executing it like so before continuing. After the inital submit it is no longer found. When I alert the typeof document on the form it returns object but when I add the onsubmit it says object expected or object is null or undefined.

Code:

function secureBarSubmit(formId)
{
alert(typeof document.getElementById(formId)); // object always
alert(typeof document.getElementById(formId).onsubmit); // func first time then it is broken

[code]...

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[object Object] Error On Photo Gallery Page Load?

Sep 23, 2011

I am using a Photo Gallery script called Galleria which uses jQuery/JavaScript to display photos. On my index page load (only in Internet Explorer), a message box pops up saying "Message from Web Page [object Object]". After clicking OK the photo gallery loads and there is no problem.No idea how to fix this, or really what the error means. You can view the error from my site here

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Error "Uncaught TypeError: Object [object Object] Has No Method"

Nov 19, 2011

I just got this script for a countdown on a website and I got it to work locally but when I upload it to the server i get the error "index.html:22 Uncaught TypeError: Object [object Object] has no method 'fancycountdown'".

I have checked to make sure all other javascript files are loading and they are and I can't figure out whats wrong. You can see it [URL]

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JQuery :: Error In IE - Error: 'url' Is Null Or Not An Object

Jun 17, 2009

Site - [URL] Location of js and css - [URL] The jCarousel works great in all other browsers, but in IE, when you get to the end of the jCarousel it gives the "Error: 'url' is null or not an object" pop up and it won't let me use the left arrow buttons to go back.

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Addition Of The Print Statement Provides An Error "JScript Runtime Error: Object Expected"

Oct 19, 2011

I have taken part of some code I know works and simply added a print statemet to it as I want it to print to the command prompt, where I am running the script, the value of REMOTEDIR why the addition of the print statement provides an error: ERROR: JScript runtime error: Object expected

[Code]...

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Accessing Private Members In Extensions

Mar 2, 2011

I'm trying to create an extensible class with private members.

Suppose I have the following:

Code:

Obviously, only "y" should be available to instantiations:

Code:

But how can I now extend this class and still access the private properties inside the extension?

Code:

How do I access x there? The someOtherFunction extension is part of the prototype, so it should be in the same scope as someFunction, no?

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JQuery :: Getting CSS Class As Object?

Feb 14, 2011

Is there anyway to have a CSS class returned as an object? This would be rather useful to feed, for example, to the .animate() function. There is no way to animate directly to a CSS class as destination, is there?

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Changing The Class Of An Object?

May 21, 2011

i have this code for changing the class of object 1 as mouse comes over object 2, the class changes back when mouses goes out.

Code:
<SCRIPT type="text/javascript">
function changeClass(floor3)
{
var obj = document.getElementById(floor3);

[Code].....

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Error Msg In Code-Class - Interface Or Enum Expected

May 15, 2010

error I am getting in java. Im using blue j. I have a feeling its something other than just braces missing somewhere, I have looked carefully and I'm:confused: just having bad luck!! I cant proceed to the next stage of my code unless I get this bit perfected with no syntax errors.

[Code]....

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JQuery :: Sequencing Operation On Members Of An Array?

Sep 23, 2011

I have an array of divs, and can do a style change on them:

var Ray = new Array("first", "second", "nth");
function bluRay() {
$('#' + Ray.join(',#')).animate({color: '#00f'}, 600);}

( The divs don't share a class, and it'd be code-heavy to add classes for all the necessary variations on this function. )

How to make the operation on the divs sequential, at say, 500ms intervals?

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Using Code On A Webpage That Lists The Site Members?

May 6, 2011

I am currently using this code on a webpage that lists the site members.

function toggleMenu(objID) {
if (!document.getElementById) return;
var ob = document.getElementById(objID).style;

[code]....

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How Do I Access The Object Instance From Within Class

Apr 22, 2007

I have a javascript object which dynamically generates a table adding, deleting and moving rows as the user clicks on buttons or links. Problem is when I generate a table row and add the javascript method call to my class, I have to put the object instance name variable of the class in order for it to be called from the onclick=function(). This is seriously limiting, but I'm stuck for a way round it. Heres a edited of the code so you get the idea....

Instantiating the object :-

var dtl = new DynamicTableList("table1", $
{myObject.allFieldsAsJavaScriptArray}, true, true, true);


My javascript class DynamicTableList, note the dtl javascript object
instance variable being referred to in the addRow function. How can I
avoid this???

function DynamicTableList(thisObjName, tableName, options, showDelete,
showUp, showDown)
{
this.processRow = function(r, row, up, down)
{
...
};

this.processRows = function()
{
...
};

this.getVisibility = function(visible)
{
...
};

this.delRow = function(button)
{
...
};

this.addRow = function(selection)
{
...

if (showDelete)
{
var cell2 = document.createElement('TD');
var inp2 = document.createElement('IMG');
/
************************************************** ***********************************************/
inp2.onclick=function(){dtl.delRow(this);} // Have to specify
dtc!!!!!!!!
/
************************************************** ***********************************************/
inp2.title='Delete'
inp2.alt='Delete'
inp2.src='images/delete.gif'
cell2.appendChild(inp2);
row.appendChild(cell2);
}

...

tbody.appendChild(row);

this.processRows();
};

this.moveRow = function(node, vector)
{
};
}

Obviously the code dtl.delRow(this); is being dynamically generated, but how do I replace the dtl instance name with something that'll work whatever the user of this class calls the instance of it!

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JQuery :: Get ID Of Every Object In Class On Each Loop?

Feb 26, 2010

I have an each loop that goes through all the elements in a certain class. What I need to do is get the ID of the current element in the each loop, but I can't seem to figure out how to. var currentID =$(this).attr ("id"); was my first assumption, but it's not working. [code]The css is just for debugging, not the goal, so alternate ways for me to do that won't help.

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JQuery :: Toggle Css Class Of Object

Oct 25, 2011

I am working on a Master-Detail grid that allows users to click on master rows to show or hide details rows. [code]What I want to do is to add Expandable class to SummaryRow if it's collapsed, add Collapsible class if it's expanded. But I don't know how to do that.

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New Object From User-defined Class In IE8?

Nov 18, 2010

I've been writing a slideshow script that I've had working perfectly on my mac in Chrome and Safari, however I went to look at it in IE8 and lo and behold it falls over. It says 'object doesn't support this property or method' in relation to the new SlideShow line in the main() function.

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Function To Add Members Rearranging Array List When Entered?

Jun 17, 2009

I have a form that is done in php I'm converting it to .NET but the java script has an error. I posted all the code but the error is in the "saveOtherSurvivorValues" function i think. What happens is when you click the "add survivor" link to add a the first survivor and then fill out the information for the first survivor then click add survivor a second time for a second survivor it moves the data from the 1st survivor into different fields to produce in accurate data.

Here is a link to the live form.

[URL]

using System;
using System.Collections;
using System.Configuration;
using System.Data;

[Code]....

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Function To Add Members Rearranging Array List When Entered - ASP.NET?

Jun 17, 2009

I have a form that is done in php I'm converting it to .NET but the java script has an error. I posted all the code but the error is in the "saveOtherSurvivorValues" function i think. What happens is when you click the "add survivor" link to add a the first survivor and then fill out the information for the first survivor then click add survivor a second time for a second survivor it moves the data from the 1st survivor into different fields to produce in accurate data.

using System;
using System.Collections;
using System.Configuration;

[code].....

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The Timer Class, For Object-oriented Timeouts

Nov 27, 2002

The problems with the setTimeout and setInterval functions provided in Javascript are twofold. First, you can't call a local object method without losing your scope, and second, you can't pass objects to the function, since the function call is implemented as a string.

The Timer class solves these difficulties by employing a static array to store the parent object and function arguments until the function is called.

This class is provided as-is and pro bono, so go ahead and muck with it if you see things that could be done better.

Thanks to WA for giving me the idea for this (albeit indirectly)!

Updated 4/18/2003: Footprint decreased, minor code improvements.
Updated 5/3/2003: Minor comment clarification; no code changes.
Updated 5/10/2003: Minor code improvements.
// The constructor should be called with
// the parent object (optional, defaults to window).

function Timer(){
this.obj = (arguments.length)?arguments[0]:window;
return this;
}

// The set functions should be called with:
// - The name of the object method (as a string) (required)
// - The millisecond delay (required)
// - Any number of extra arguments, which will all be
// passed to the method when it is evaluated.

Timer.prototype.setInterval = function(func, msec){
var i = Timer.getNew();
var t = Timer.buildCall(this.obj, i, arguments);
Timer.set[i].timer = window.setInterval(t,msec);
return i;
}
Timer.prototype.setTimeout = function(func, msec){
var i = Timer.getNew();
Timer.buildCall(this.obj, i, arguments);
Timer.set[i].timer = window.setTimeout("Timer.callOnce("+i+");",msec);
return i;
}

// The clear functions should be called with
// the return value from the equivalent set function.

Timer.prototype.clearInterval = function(i){
if(!Timer.set[i]) return;
window.clearInterval(Timer.set[i].timer);
Timer.set[i] = null;
}
Timer.prototype.clearTimeout = function(i){
if(!Timer.set[i]) return;
window.clearTimeout(Timer.set[i].timer);
Timer.set[i] = null;
}

// Private data

Timer.set = new Array();
Timer.buildCall = function(obj, i, args){
var t = "";
Timer.set[i] = new Array();
if(obj != window){
Timer.set[i].obj = obj;
t = "Timer.set["+i+"].obj.";
}
t += args[0]+"(";
if(args.length > 2){
Timer.set[i][0] = args[2];
t += "Timer.set["+i+"][0]";
for(var j=1; (j+2)<args.length; j++){
Timer.set[i][j] = args[j+2];
t += ", Timer.set["+i+"]["+j+"]";
}}
t += ");";
Timer.set[i].call = t;
return t;
}
Timer.callOnce = function(i){
if(!Timer.set[i]) return;
eval(Timer.set[i].call);
Timer.set[i] = null;
}
Timer.getNew = function(){
var i = 0;
while(Timer.set[i]) i++;
return i;
}
Here's an example of the code in action:
function Ticker(){
this.count = 0;
this.timer = new Timer(this);
}
Ticker.prototype.tick = function(d){
this.count+=d;
window.status = ""+this.count;
this.timer.setTimeout("tick", 1000, d);
}

window.onload = function(){
var ticker = new Ticker();
ticker.tick(1);
}

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Class Array In Custom Object Not Working?

Jan 19, 2010

I have created a class array (or variable that contains an array) and am trying to add an element to the array when a new Element object is created. Thus, the line of code to add a new element to the array is within the Element object's constructor function. However, the browser just gives me an error "object expected on line 9", the line of code trying to add an element to the array.

Are arrays not functional within objects? Or, is it that the array is made as a class variable?

Code:
function Element() {
// INSTANCE VARIABLES
this.name = "newElement" + Element.total_elements_created; // GIVE UNIQUE NAME
// INITIALIZATIONS
Element.element_count ++; // INCREASE TOTAL NUMBER OF ELEMENTS EXISTING

[Code]...

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Call Member Of Class Without Object Initiation?

Jun 22, 2011

Is there any way to call a method of a 'class' in without creating an instance of this class?

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Prototype :: Create A Reusable Object/class

Jul 4, 2011

What I have been doing so far to make a "class"/Reusable object is this:

PHP Code:

function Dog(){
this.name name;
this.bark = function(){

[code]...

However, recently I have been reading a book on Javascript and it said that the problem with this way of doing it, is that the bark() function will be loaded into memory for each Dog object created this way, while the body of that function is the same for each object.

- A Person class with a name property and a jump() method.

- An animal class with a isMammal property and move() method.

- A Dog class with a numberOfLegs property and a bark() method which is a subclass of Animal (thus inherits the isMammal property and move() method.

- Each of those classes in its own file.

This book I've been reading is actually pretty good, but at some points it's explanation is not rich enough.It explains that functions are objects and that objects in javascript are just key-value pairs. It says that each function has a prototype property which points to a blank Object(), but you can make it point to something else? or maybe I misunderstood it. I still don't understand how it really works.

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Object Error

Mar 27, 2006

Can someone please illuminate to me why, in the following snippet of script,
the alert statement in the try-catch gives me [object Error] ? The file
'http://localhost:1222/roomx1/getdata.php' truly does exist.

if(typeof window.ActiveXObject != 'undefined'){
req = new ActiveXObject("Microsoft.XMLHTTP");
req.onreadystatechange=processReqChange;
}else{
req = new XMLHttpRequest();
req.onload=processReqChange;
}
try{
req.open('GET', 'http://localhost:1222/roomx1/getdata.php',true);
}catch(e){
alert(e);
}

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