Test For Existence Of Dynamic Variable
Mar 26, 2006
I am using Javascript to add rows to tables, etc. in a function I am
calling. I pass the function the ID of the div, and what I want in the
rows, and it will add rows to a table in the div.
The problem is I need to test for the existence of the table - and if
the variable or object doesn't exist already my code errors -
PLEASE REMEMBER - I don't know the name of the variable or object I am
testing the existance for - it is created dynamically based on the
divID. So when I test for this object or variable the test has to be
for a dynamically created object - Code:
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Mar 14, 2009
I'm using the standard module pattern and the problem is once you set a private variable, trying to test that object independently becomes a nightmare as the next test is polluted by the actions of the previous.So, the options are to have some reset method (which is horrible), setters on everything (defeats the point) or delete object and re-load script (hideous).
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Jan 29, 2009
I'm processing a form with numbered fields, but I don't know how many fields there are. Might be 1, might be 20. So I'm iterating through 1-20 and trying the following test:
for(i=1; i<=20; i++) {
if(typeof(eval('document.edit_orderitem_form.field_'+i+'.value')) != 'undefined') {
[doing stuff with the form field here]
}
}
The script quits on that line with "Undefined value" showing up in Safari's error console. I just can't figure out how to eval() the name of a field when it may or may not exist.
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Mar 26, 2002
How do you test a variable is an Array or not in Javascript?
Indeed, I need to get the html checkbox info in an html form like this:
<html>
<script>
function test()
[code]...
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Jun 9, 2011
I tried this code but i got an error on the it said Syntax error code...
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Mar 22, 2010
HAVE CLIENT-SIDE FORM COOKIE GET AND SET FUNCTIONS IN THE SECOND WINDOW DOCUMENT EXTERNAL JS.FILE OF A DUMY TEST SITE FOLDER ON MYCOMPUTER. IE8 THROWS 'SYNTAX ERROR' ON THE 'WINDOW.LOAD=FUNCTION, FIRST COOKIE FUNCTION HIGHLIGHTED'. CAN I ACTUALLY TEST COOKIES ON A TEST SITE ON MY COMPUTER WITHOUT THE SERVER (MYCOMPUTER) OR A DOMAIN NAME? YEAH NO HECKLING FROM THE PEANUT GALLERY.[code]...
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Aug 29, 2011
here when i click the test button it will create a new test button inside div tag.But after that if i clicked new generated test button document.getElementById("test" ).onclick = function() is not working.how can i add functions to new dynamically created fields?
<div id="a" >
</div>
<input type="button" value="Test" id="test" class="form-submit"/>
when i click the test button it will create a new test button inside div tag
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Jul 23, 2005
I have a table that I populate with an array using ASP. As each row is created, the form object names are appended a numeric, such as:
i = 1
<select name="select<%=i%>">
...
...
...
i = i+1
next
I then pass "i" to a javascript function, so that I can access the values of each form object. I can't figure out how to properly concatenate the "i" and still allow access to the value in the form object. Currently I have:
var ps = 'platSymbol' + I;
alert(ps)
var sel = 'document.frmUpdPlatGrp.' + ps + '.value'
alert(sel)
I know I'm wrong, as this comes back as a complete string. Ultimately I want to have something like this:
var s = document.frmUpdPlatGrp.platSymbol2.value - so that I can actually get the value.
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Jul 19, 2009
I have found a script that works fine for me but I'd like to make it reusable but I have an issue with that. On the script I have something like
function my_function() {
var $container = $('#panel .container');
}
and I'd like to pass the id (panel in this case) as a parameter like
in the example below:
[Code]...
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Feb 10, 2010
I have a signup form on a site that does a check on submission of fields to see if they populated and error box if not changes focus to missing field and highlights field name in red.
I wanted to improve on its effectiveness as it only checks 2 fields atm and I wanted it to check some dynamic fields as well
the fields are associative arrays generated via php as follows:-
echo "<select name='nfield[$t]'>
";
for ($i = 0; $i<count($value2); $i++) {
echo "<option value="".trim($value2[$i])."">".trim($value2[$i])."</option>
[Code]....
but this doesn't work, i think it doesn't recognise the nfield[1] syntax
I also wanted to enhance the form somewhat as atm it only displays one error popup at a time, so if the user has missed out a few fields they will get an initial popup, try and submit again and then get the second popup for the other missing field.
Can my code be modified to show a list of the missing fields and highlight all the titles in red (and if possible change the background colour of the input boxes or border the input fields in red etc)?
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Aug 30, 2010
I am trying to access a dynamic asp variable with onclick either in a javascript function where I can use it globally or set another div id with this dynamic variable.
<script>
function doSomething(article_id)
}
[code]....
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Mar 2, 2009
I am using ext js library to built ajax base site.I need to build dynamci variable and then send that variable with same name in paramter to php i have following function where first i check the array length and then loop untill the array lenght come to end and within that i get the value from html.now i want to send dynamic variables as parameter but i can do this
[Code]...
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May 10, 2005
i have script variables which are generated through a loop and i have a function which should return me the value of particular variable given a key as input to that function
Here is how my code looks like:
<script>
variable_0 = 'avlue1' ;
variable_1 = 'value2'
variable_2 = 'valeu3'
...........
function getVaribleValue(id)
{
// here i want to return the value of the particular variable given id as 0,1,2 .........
return (variable_id); // this is not working
return ('variable_'+id); // this is also not working
}
return (variable_id); gives an error as it expects a variable with name 'variable_id'
return ('variable_'+id) will give me a string named 'variable_id'
but how to get the value of the variable_0/variable_1 ......... by just replacing the id and looking for that variable.
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Mar 15, 2010
I am writing one function for product of two number. I am sending two textbox name with appending its rowid as variable to the function.will it possible to pass this dynamic variable to any function ? In below code, On event Onkeydown, I am calling funcion product with three iput dynamic variable. when i run this code,html page does not show any rows in grid.
[Code]....
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Aug 24, 2006
I have the following HTML code which is doing a GET to a page, say
MyUrl.aspx :
<body>
<form name="form1" method="get" action="MyUrl.aspx" id="form1">
<input type="hidden" name="ClickedElement" id="Messenger" />
</form>
</body>
where the the Submit() is done within a javascript function invoked at
onclick on some element.
My question is: How can I prevent form submission when MyUrl.aspx is
not available? The javascript function is:
function Clicked(MyControl)
{
var _CellContent = document.getElementById("Messenger");
_CellContent.value = MyControl.id;
document.form1.submit();
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Sep 25, 2006
Is there any possibility to check the existence of XML?
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Aug 23, 2001
How do I check if a certain word exists in a text box? For example, if I set the word to be found to "word1", if the text box is "This is word1", and alert would come up saying that "word1" was found.
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Apr 13, 2011
I am creating this Javascript/XML HTA that is basically a project tracker. I recently added some new fields in the form that are written to the XML file for the project being tracked. This makes the files neither backwards compatible if I use it in a previous version nor forward compatible for future versions. This means if a user is using version 1, I create version 2, he wants to import his old tasks to Version 2, it throws an error. For example if I have a <status> element written in the newest version, but no <status> in the previous, I can no longer use that projects XML file in a previous version.
I tried to use the following code to validate existence of the tag and assign whatever outcome as the variable to write, but it's not working. Theres a few different ways I tried.
1st Way:
Code:
2nd Way:
Code:
3rd Way:
Code:
Here's the XML file for reference.
Code:
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May 20, 2010
How can I dynamically specify a class value to use in a selector? For instance, I have a number, and I need to identify an element that ends with that number. In this case, there are four divs that have class values of
my_id_0
my_id_1
my_id_2
my_id_3
I have a 0 (obtained previously in the code) stored in the value tabId, so I want to get the values of the class attribute for <div id="my_id_0">. How do I create my selector? I tried
$("div# parent_element_id #my_id_" + tabId).attr("class");
but it comes back as undefined. Do I need to define it as a variable and put it in theelector that way? Or is there another way?
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Apr 18, 2010
I have variables coming in from JSON files via AJAX calls. Each file will have 3 variables for different background colours. Depending on which button is clicked the background will change colour to the value specified in the JSON file.
[Code]...
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Aug 16, 2011
I'm using some server side code to create a list of employees dynamically. In the HTML I have an "X" icon which will allow the admin to delete the user.I want to use the dialog box as a way to confirm or cancel the delete. If the user clicks the "X" icon I will run my server side code via $.ajax or something to remove the user.The only struggle I'm having is how to pass the row/id to the dialog box so the correct row is deleted from the database.
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May 15, 2009
I have a bit of php that creates an entry on a page for each row in a table, some pages may have multiple entries, others just one.
eg.
<h2 class="title">{title}</h2>
{summary}
<p onclick="openBox({entry_id})">Click to read more ></p>
<div id="{entry_id}" style="display:hidden;">{body}</div>
I would like to have just one function to open and close all individually, eg.
$(document).ready(function(){
function openBox(id){
if ($("#id:first").is(":hidden")) {
[Code].....
Well I know I'm doing something wrong as this is not working, and I don't know how better to explain I hope this is sufficient, I'm not worrried about the php/html bit as that is working fine.
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Feb 15, 2009
I'm new to javascript and still trying to learn my way around. Below is my code
<script type ="text/javascript">
var a1 = "2";
var t2 = "hello world";
var total = ("t" + a1);
alert(total);
</script>
That code will display the string "t2" rather than the value of the variable t2. How do I make javascript display the value of the variable rather than the string?
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Jul 22, 2010
I would like to create dynamic variable name and assign values to them.
Something like this:
I want to create these names dynamically.
I tried: var item{i} where i is the dynamic variable.
Nothing seems to be working.
I also tried:
It doesnt recognize : var eval('item'+i)
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Jul 20, 2005
Suppose I have global variables: x1, x2, x3
and I have a function that needs to assign a value to a new global variable
x4
something like
function foo ()
{
count = 0;
do {
count ++
varname = 'x'+ count
} while (globalExists (varname)
eval ( varname + ' = "I am new in the x-series" ' )
}
how would the function globalExists () be implemented ?
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Jul 20, 2005
Is it possible to check for the existence of an element? I have a dynamic
page which may or may not have a <div> holding a bunch of thumbnails, and I
want a function to check for the existence of the <div>. Doing:
blah = getElementById("thumbnails");
Generates an error.... I was hoping it would just return false or
something... Is there a way of doing this?
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