Watch Variable Values Inside Functions?
Jul 2, 2010Is there any way we can watch variable values inside javascript functions while running through the debugger. I am using javascript along with ASP.net on Visual studio 2010.
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Moving Variable Inside Functions ?
Jun 6, 2009I have a problem that 'test' is not passed. The following function alert undefined, but it should alert test. Why that?
PHP Code:
Moving Variable Inside Functions - Alert Undefined ?
Jun 7, 2009I have a problem that 'test' is not passed. The following function alert undefined, but it should alert test. Why that?
View 1 Replies View RelatedCan't Inspect Or Watch Variable In Microsoft Script Debugger.
Oct 3, 2006I have a javascript program that works fine under Firefox and on IE
when running XP, but is having a problem with IE running under Windows
2000 Pro.
On my personal XP development machine I have the Microsoft Script
Editor and I can set a breakpoint, step through code, inspect
variables, etc... with no problem.
On a machine where I am trying to debug this problem I am running
Windows 2000 Pro with IE 6. I installed the Microsoft Script Debugger.
When the program hits the exception the script debugger will come up
and show me the line where the error occurred.
I need to be able to inspect the variables to determine the problem.
However, from what I can tell, there isn't anywhere to inspect or watch
the variables in MSD?
ChangeYear - GetFullYear - SetFullYear Functions - Extract The 4-digit Value From The Today Variable And Store The Value In A Variable Named Year
Oct 13, 2009a.) specify two parameters for the changeYear function: today and holiday.
function changeYear(today)(holiday){
b.) in the first line of the above function, use the getFullYear() date method to extract the 4-digit value from the today variable and store the value in a variable named year.
first line
c.) in the second line; use the setFullYear() date method to set the full year of the holiday date object to the value of the year variable.
second line
d.) in the third line, use a conditional operator on the year variable. The test condition is whether the value of the holiday date object is less than the today date object. If it is, this means that the event has already passed in the current year and the value of the year variable should be increased by 1.
third line
e.) in the fourth line of the function, again set the full year value of the holiday date object to the value of the year variable.
Variable Declaration Inside Eval Inside With
Apr 11, 2007consider the next code:
var obj = {};
with(obj) {
var x = 10;
}
print(x);
print(obj.x);
It prints 10 and undefined. Here, one could expect that obj.x get the
value 10. But it's not the case, because variable declarations are
placed at the start of function code (or global code), so the
previous code is equivalent with:
var obj;
var x;
obj = {};
with(obj) {
x = 10;
}
print(x);
print(obj.x);
You can clearly see now that x is placed in the outer context. But
consider the next:
var obj = {};
with(obj) {
eval("var x = 10;");
}
print(x);
print(obj.x);
I was expecting that obj.x would get the value 10 here. But no, it
gives the same output as the previous code. I tested it with
spidermonkey, kjs and ie jscript. Looking at the ECMA spec, I could
not find anything that describes that behaviour. Code:
Declare A Variable Inside A Function - Returns White Space - Not Variable Value
Aug 17, 2010I am trying to declare a variable inside a function and use it later on in my code... but it just already returns white space... i.e. not variable value. I am setting it within this function:
function show_video1(){
document.getElementById('video1').style.display="block";
var video1Name = "Education World News (Part 1)";
document.getElementById('video2').style.display="none";
document.getElementById('video3').style.display="none";
document.getElementById('video4').style.display="none";
[Code]...
and trying to call it later on with this: <script type="text/javascript">document.write(video1Name)</script> It might be worth noting that each one of my 11 videos will hace a different name.
Calling 2 Functions From Inside An If Else?
Nov 26, 2010I have an embarrassingly similar problem to the last time I was here. I have a google map that generates links and checkboxes from an xml file and puts them in a sidebar. The links open infowindows and the checkboxes show or hide lines on the map.
Which all works ok. But (like last time) I have another function that puts arrowheads along those lines to indicate directionality.
The code which turns the lines off and on looks like this:
function togglePoly(poly_num) {
if (document.getElementById('poly'+poly_num)) {
if (document.getElementById('poly'+poly_num).checked) {
gpolys[poly_num].show();
[Code]...
JQuery :: Calling Other Functions Inside A Function?
Jul 21, 2009This is probably more of a basic javascript question than a specificjquery function.I have this jQuery function named validateSubmit()which calls two other regular javascript functions. When using IE,both createCharts() and getDirectorIDs get called but when usingFireFox, only createCharts() gets called and never makes it togetDirectorIDs() and I'm not sure why this occurs.
<script type="text/javascript">
// make sure at least one checkbox is checked
function validateSubmit() {
[code]....
JQuery :: Accessing Functions Inside $(document).ready()?
Sep 21, 2009I've got a js file where all the functions are wrapped inside $(document).ready(). I want to call one of the function from within the HTML but it says that the function "is not defined".
View 10 Replies View RelatedJQuery :: None Of UI Functions Work When Called Inside Object?
Apr 2, 2009I am using objects in JS and I am trying to add draggable() into a DIV that works when I move the function out of the object context.
Example:
Code:
That does not work. However, if I do this:
Code:
Then it will work... because the draggable() function is not within the object.
I need this to work within the object, because I will have several DIVs associated with objects and I need them to have draggable() in specific cases.
Jquery :: Grouping Existing Top Level Functions Inside Closure
Nov 24, 2009I'm trying to group some existing top-level functions inside a closure (to avoid polluting the global namespace) but I'm not quite getting it to work. First, all the JS works outside my anonymous function, but once I put it in the anonymous function I get an error of "crossfade is not defined". I'm not quite getting why the the setInterval/crossfade works outside the anonymous function but not inside. Anything inside start() should be able to see vars/functions outside start() and it should all be protected in the closure created by the top-level anonymous function? I'm not trying to access anything *within* crossfade(), I'm just trying to execute it.
Code:
(function($) {
//vars up here that internal functions can access
//also using some jquery inside here, so using $
function crossfade() {
//body here
}
//other functions
function start() {
//body here
cInterval = setInterval('crossfade()', 5000);
}
})(jQuery);
Passing Values In Functions?
Dec 19, 2010Recently I decided to branch out and learn some Javascript on my own. I'm getting the following error: Uncaught ReferenceError: array is not defined
I don't quite understand why I'm getting this error, as I've created the array in the function showPrompt and it seems as though it's being passed around correctly. However, I believe the problem is with generateBoxes, specifically this part here:
onclick=\"getValue(array, i)\"
(line 39)
Removing array from the function parameter seems to make it execute, but beyond that, i'm lost to what is wrong.
Here's the code:
function showPrompt () {
Obtains user input
var array = new Array();
var box = prompt("Please enter number of boxes","1");
[Code].....
Passing Values In Functions
Mar 13, 2006Code:
<script language="javascript" type="text/javascript">
function open_win2(var)
{
window.open("link.php?variable=var","Page","toolbar=no, location=yes, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width=545, height=600")
}
</script> .....
Getting The Default Values In Functions?
Sep 8, 2004I would like to call a function with parameters, i.e. multiply('2','3','box1').In this example, the first argument would be multiplied with the second and written into the div with the id="box1". How can I set a default value for the third argument? => so if I call multiply('2','3') then it should automatically set the output-variable to 'box1' if not other defined in the call.
View 7 Replies View RelatedUsing Array Count Values Functions?
Jan 27, 2010I need to use an equivalent of the php function
array_count_values()
Passing Values Of Variables Between Functions Not Working ?
Aug 12, 2010I'm trying to trap a user entry that cannot be found in the database. When a code is entered, the page should give a "Code Not Found" message if it is an undefined value.
However, it didn't; and it always shows the "undefined" value to the page instead.
Here's what I actually did:
getting user input:
Finding the code:
Using Variable To Control Two Functions
Aug 11, 2011<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>JS: Image Slider</title>
<script type="text/javascript">
[Code]....
My problem is that every other turn I have to click either button twice to start the desired function. Say, I autoplay the images first and I want to shuffle them, I click shuffle and the autoplay stops working and I need to click shuffle again and then the shuffle runs. How can I make it clicked once and the function runs?
Functions - Passing In Parameters And Then Calling The Function With The Values To Maybe Add Something Together
Jul 27, 2011I totally understand that in order to learn javascript I need to know how functions work, I understand the basics of passing in parameters and then calling the function with the values to maybe add something together etc I ve read countless articles about functions as well as books etc but I just dont get how they are used and when they should be used etc, the more advanced functions that have maybe 4 parameters and are doing different calculations and returning various values that get fired back into the script just totally confuses me.
What I would like to know is first of all how can I overcome this confusion and also any words of wisdom you may have. I will also add that I have no prior programming experience and have spent the last 2 months frequently hitting my head off a brick wall as I just cant understand javascript.
Make A Variable Available To Other Functions Outside A Function?
Feb 12, 2010Is it possible to make a variable available to other functions outside a function So to make it global from within a function without using a callback
function() {
var something = 'hello';
}
function(something) {
document.write(something);
}
something like that possible??
Local Variable In Multi Functions?
May 20, 2011i'm having the following problem, normaly i work with html css and php but for this to work i need to make a litle javascript function and i'm still kinda new to it. so here is my problem.i'm making a search field where someone has to select some radiobuttons.first it has a selection out of 4 items and then a selection out of like 20 but how do i get the value from the first function in the second?in this case i would like to have the following in function showStreek:
xmlhttp.open("GET","test3.php?l="+land,true);
this line should look like:
xmlhttp.open("GET","test3.php?k="+kleur"l="+land,true);
[code]....
Forms - Functions And Variable Declaration
May 28, 2009I have been having trouble with forms and functions. On my wife's site I have some forms and some of them have radio buttons. My current radio button checker is cumbersome and it is time for something more elegant (some of you will say if it isn't broke don't fix it )
The new code is below:
Code:
Basically I want to pass into the function radio button values 1 & 2 denoted by firstChoice and secondChoice (eventually I want to also pass in the form name but 1 step at a time).
The buttons can have the value (names?) of pattern, chalkboard or kit. It is for a shopping cart (Mal's E-commerce) and this is part of the JS validation. I am using onsubmit to call the function viz.
HTML Code:
Seems ok (to me at least) but when I try to get it to work it throws up an error of
Code:
It stops at that point but undoubtably chalkboard would throw up the same error if it continued.
How would I define the variables in my function? Are they strings, integers, who cares?
Where would I define them? Global or local?
Is the problem a matter of syntax e.g. if I put ' ' or " " around them would that suffice?
Call Functions From (string) Variable?
Nov 14, 2005How can I call functions from the value of a variable?
I do this in PHP, like $variable(); or {$variable . 'CallBack'} or using something like call_user_func().
I've been search all day though, and can't find how to do this in javascript. Is it possible?
Objects, Callback Functions And Variable Scope
Nov 23, 2005I am trying to convert some of my javascripts into a class and am
running into difficulties which i think are related to variable scope.
Basically I have a constructor function for a calendarInput class that
takes 4 parameters, the first is a reference name/number for this
input. I also have some functions for importing my PHP classes into
Javascript using AJAX (properties only. still trying to get methods
working but that's another story!). The relevant function is called
call_object_method(classname, methodname, createparams, methodparams,
post, callbackfunction). This creates an instance of the specified PHP
class using the parameters in createparams. It then calls the
specified method using the parameters in methodparams. The result is
passed back to the javascript function specified in the callbackfunction parameter (ie the value of xmlhttp.onreadystatechange is set to callbackfunction before xmlhttp.send() is called)
The function i am trying to fix is called show (x,y) which creates the
html for the calendarInput and displays it at co-ordinates x, y.
So, my code is as follows:
function calendarInput(calendarid, target, displaytarget, value)
{
this.calendarid = calendarid;
this.target = target;
this.displaytarget = displaytarget;
this.value = value;
this.show = function(x, y)
{
<!--// bunch of init and prepping code. includes creating
createparams and methodparams arrays //-->
call_object_method("cms_calendar", "getcalendarview",
createparams, methodparams, false, this.showcallback);
}
this.showcallback = function()
{
alert(this);
<!--//code to create html//-->
}
}
I know i've cut out most of the innards of this. This is because I
have already tested these functions and had the calendarInput working
outside of a class, hence am pretty sure that this is ok (plus it runs
to almost 1000 lines these days!!). My problem is that when I call the
show method, the alert on the first line of the callback function
returns the function showcallback instead of (as i was expecting) the
instance of the calendarInput object. Whilst this kinda makes sense I
can't figure out how to reference the Object instead. I have tried
'this.parent' but this returned undefined. I have tried changing the
way i reference the callback function (ie the final parameter of
call_object_method) but no joy.
JQuery :: Functions With Variable Number Of Arguments?
Jul 26, 2011So in the Tutorials:How jQuery Works, I've noticed that you can make a call to .get like this : $.get('myhtmlpage.html', myCallBack);
I've also noticed that in the docs jQuery.get() is described as jQuery.get( url, [data,] [success(data, textStatus, jqXHR),] [dataType] ). My question is, in the above example, the callback function is the second argument, whereas in the docs the second argument is data, and the third is the callback function. How does this work? Also, what does it mean when the arguments are laid out in an array-like fashion with commas in the square brackets? i.e. arg1, [arg2,]...
JQuery :: Variable Scope And Un-named Functions?
Aug 23, 2010I've recently started developing javascript using jQuery and so far I'm really enjoying it.Being a professional programmer (mainly C, C++, java and python) there is one thing that's been puzzling me regarding variable scope and unnamed function declarations. Let me exemplify:
------------------------
var sum = 0;
$(xmlobj).find("item").each(function(){
[code]....
