Dynamic Named Variables
Feb 18, 2004
I have a little problem that doesn't seem to be working. I'm trying to access a variable using its string name which is passed when the function is called Code: ie:
function a(varName, other crap...) {
document.getElementById("sometag").innerHTML = ['varName'].somevalue;
}
// I would call this function like so...
a("temp1", othercrap...);
The variable temp1 is set in another script file. I don't specifically know which variable I will be passing to the function a(), all I have is its string representation. I can access the values of temp1 if I specifically call it but I can't seem to figure out how to call it dynamically.
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Jul 23, 2005
I need to create a variable out of nothing. From a database I extract an
item with a certain id. With this id I want to create a new variable.
For example:
id = 36;
"item"+id = new Array();
Now I get the message "Illegal left hand assignment".
I tried:
eval("item"+id) = new Array();
Is it possible to create a variable out of nothing?
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Jan 24, 2007
I am trying to write a loop that will add 10 divs to the screen. Each
div will have an onclick event. The function that will be called
onclick requires a parameter. That parameter is dynamic based on the
index of the loop. In Firefox this is no problem. However in IE I get
some results that I wouldn't expect.
Here is my code:
for(var i = 0; i < 10; i++)
{
var linename = jsonObj.lines[i].line;
var childcountid = jsonObj.lines[i].childcount;
var lineid = jsonObj.lines[i].lineid;
var newdiv = document.createElement('div');
newdiv.setAttribute("id","main" + i);
if (navigator.appName == "Microsoft Internet Explorer")
{
//************ this is the problem area
*****************
newspan.attachEvent("onclick", function() {getCategories('main' +
i)});
}
else
{
newspan.setAttribute("onclick", "getCategories('main" + i + "')");
}
document.getElementById('container').appendChild(n ewdiv);
}
What happens is when the element is clicked the parameter being passed
to getCategories is always 'main9' IE always grabs the current value
of i, not the value of i at the stage of the loop that attachEvent was
called.....
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Jul 16, 2011
I'm creating dynamic buttons and forms for a website and would like the form hidden when it's corresponding button is clicked. However, when I pass button and form name variables to my JavaScript that hides the form, the variables are not being recognised unless I explicitly set them. (e.g 1 and 2 as seen below).
In a nutshell the onlick event doesn't seem to like PHP variables !
[Code]...
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Sep 20, 2007
I'm working on a rather complex booking system for building European
trips, in a combination of SQL/VBScript/Javascript. There are tons of
query string variables that get passed back and forth between the
pages, and in almost every case, I can set 'em up fine, provided the
variables are in the link.
The page the *holds* the booking information, though, is problematic.
An example trip might include two European cities or towns with a week
in each in an apartment or cottage that the user selects from a dozen
or properties for each region.
All the information is on one page (all the dozen or so properties for
each weeks, available dates for the trip and for each , max occupancy
per property, pricing per property and per number of passengers,
etc...everything necessary to actually book the trip). If the user
changes party size or chooses a date, properties are hidden or shown
depending on max occupancy and/or availability.
So, a user sets their date and party size (or maybe just the party
size, or maybe has just cleared everything out to start over...) then
wants to view available properties so they can find one they like. The
current pax/date/etc. information is not in the query variables,
because the link was built at runtime.
If I build the link in an onclick event, it breaks if someone right
clicks to open a new page or tab.
I hate sites that disable right click menu. I hate sites where, when
you open a new page with a right click, it generates a javascript
error if the URL is created with an onclick event. I hate that using
an onclick to bring up the page means whatever is showing in the
status bar bears no resemblance to the page that is brought up when
you click on the link.
My client isn't worried about the non-javascript people for this use;
those people are referred to a free spiffy catalog, which frankly, is
how most of this client's customers book their trip anyway. I just
want to be able to carry the variables in such a way as to not break
the site if someone right clicks.
Anybody have any suggestions? Is it hopeless?
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Jun 14, 2009
I'm building up a RSS reader. In this app, the user will have the option to add and remove urls in a list. What I need is to create a new variable, everytime the user submit the form with the url. The variable must contain the url.
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Jun 29, 2010
I am developing a site that adds multiple dynamic buttons. I would be ideal if the event these buttons trigger could pass a 'variable' (the passed variable is constant with respect to each button).
My attempt...
myButton.setAttribute("onClick", "myFunction(" + myVar +")");
...doesn't seem to work.
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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 phpi 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:
addvalue = function(){
var id_str=document.getElementById('array_chk').value;
[code]....
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Mar 19, 2011
I have got this piece of code:
Code:
I would like to display the number 1 at first and then 2. but this code produces number 2 for both alerts. I was able to achieve what i wanted with "new" constructor when creating functions but this is not a good practice and after all i am passing these functions as an event handlers and it can't be done with "new" keyword because it is throwing error. I think there are some solutions with arrays e.g the x would be an array of numbers, but i don't like it. Am i missing something important?
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May 17, 2010
I am putting the following source anchor code but cannot get the expected results in Internet Explorer.
<a href="#selected"><button type="button" id="button" value="button">Content</button></a>
Destination anchor code:
<span style="position:absolute;"><a name="selected" id="selected"></a></span>
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Jul 23, 2005
I use a subroutine to popup windows in my sebsite. It looks like this :
function poplink(filename)
{
filestring = filename + "htm"
LinkWindow = window.open(filestring,'LinkWindow','');
}
Filename is just the extensionless web page name e.g. "Addresses"
Problem is of course every window popped up will replace the previously
popped up window and in the case of a popped up window popping up a window
the new window will just replace the calling window.
(Please, no lectures on popping up windows, I need to in my particular case
and here I'm just stripping it down to the bare problem for claritie and
simplicities s sake)
I'd be happy if I could create a new window handle each time so that all my
popup windows will be unique. If it could be the filename that would be fine
e.g. instead of the window handle variable being "LinkWindow" it would be
"Addresses". Is there some way of making the variable I assign the new
window to a variable? All I can come up with is somehow having LinkWindow an
array of window handles and just keep incrementing it e.g.
LinkWindow[100]; // 100 is more than enough windows for a typical session
LinkWindowCount = 0;
function poplink(filename)
{
filestring = filename + "htm"
LinkWindow[LinkWindowCount] = window.open(filestring,'LinkWindow','');
if (LinkWindowCount < 99)
LinkWindowCount++;
else
LinkWindowCount = 0;
}
What would be the correct syntax for creating LinkWindow as an array or is
there a better way of accomplishing the same thing?
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Jul 23, 2005
I use named anchors to take users to specific parts of a long page. But I
want to add some processing and do some things with my nav bar when users go
to certain sections delineated by named anchors. I understand that the
anchors array creates an element for each anchor in the page when the page
is loaded, but how do I identify which anchor is currently being viewed?
Here's some pseudo code:
if (document.anchors.name == "section_B") {
then do this or that
}
But what do I test to determine the current anchor name?
What about using id's instead of names? Can the anchors array return
anchors created with id's as well as names? Would this be of any benefit?
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Jul 23, 2005
When are named elements written with script accessible to script?
<html><head><script type="text/javascript">
function ready() {
alert( document.getElementsByName("div").length );
}
</script></head>
<body onload="ready()">
<script type="text/javascript">
document.open();
document.writeln( "<div name="div"></div>" );
document.close();
</script>
</body></html>
IOW, why are there 0 elements named div at the time the <body>
element's onload handler is invoked? When can I retrieve this named
div from the document hierarchy?
This exercise is necessary since code I have written using the DOM
(that works) has to run on God-forsaken browsers such as IE 5.1 for
Mac whose support for the DOM is spotty at best.
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Dec 23, 2005
The problem goes like this:
For each element in the currently loaded markup page that has an 'id'
attribute, elements can be accessed like-
var elem = document.getElementById("foo"); - ("foo" is the 'id')
now i want to implement a shorthand method which can give me the
element just by this:
var elem = document.foo; -("foo" is the 'id');
For this , i will have to add properties to the global "document"
object for each element in the currently loaded page that has an
attribute. These properties should be added when a page is loaded , and
should be removed when a page is unloaded..
How can i dynamically add and remove property to an object.
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Jul 6, 2009
How come none of these work :
document.getElementByID("repondant(1)").value;
document.forms.ajouterunelement.repondant(1).value;
how can i get the value of a field that is named repondant(1)?
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Oct 28, 2010
As title says I need to create variable named with value of other variable! So is that possible?
What exactly I need is something like this:
for(var i=0; i<11; i++){
var Img[i] = ""
}
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Jul 7, 2004
The problem I'm facing is I have a form which isn't name (and no I can't name it either ). And I want to fill in the value of one of the text inputs.
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Feb 1, 2011
I have the following pieces of jquery code.
$(function () {
$('select[id$=lstOwnership]').bind("change keyup", function () {
if ($(this).val() == 2) {
[code]....
Based on this logic, I'd like to show/hide the ID tag based on the values of a drop down list and another textbox. They both work fine but the problem I'm having is that each can cancel out the other. For example, if the 'txtPercentOther' textbox value is 3 and the drop down item has a value of 2, the ID tag is shown which is fine. But if I were to change the drop down list value to something else, it'll hide the ID tag, even though the other text box still has a value of 3 which means the ID tag should remain shown. I'm wondering if I maybe need to name my function so I can call the other in each.
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Nov 2, 2010
I've been using jQuery for some time now but this is the first time I've run into something odd. Currently I'm developing a Theme for Concrete5.4.0.5, which automatically includes jQuery 1.4.2 - meaning, I can't use any other version of jQuery, that said: here is my problem.
I've got the following HTML (heavily simplified):
<nav id="mainNav">
<ul>
<li>Home</li>
<li>Text
<ul>
<li>Subnav</li>
</ul></li>
<li>Text
<ul><li>Subnav</li>
</ul></li>
</ul></nav>
<section id="contentWrapper">
...
</section>
And the following JS-jQuery Code (original, not simplified):
function hoehenAngleichen(){
if($('#mainNav').height() > $('#contentWrapper').height()){
$('#contentWrapper').height($('#mainNav').height());
}}
$(window).load(hoehenAngleichen);
/* works fine until here */
$('#mainNav li').bind('onmouseover onmouseout', hoehenAngleichen); //will not trigger
I want the "hoehenAngleichen" function to be triggered whenever someone is hovering or leaving a li-Element. But this code seems not to bind the events with the named function properly.
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Dec 12, 2011
I have a few divs with the name
Now i want to check all this divs with while
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Jul 20, 2005
I was wondering if it is possible to target a named anchor in a frame when
opening a new window with a javascript function? has anyone actualy been
able to do this?
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Sep 25, 2011
I need little help with arrays :))
[Code]...
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Oct 5, 2011
I have an arbitrary number of check boxes called for instance
<input type="checkbox" id="delete_author_checkbox_0">Box 0
<input type="checkbox" id="delete_author_checkbox_1">Box 1
<input type="checkbox" id="delete_author_checkbox_2">Box 2
[code]....
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Jun 4, 2011
I have ONE page which consists of php, html, and javascript, all on the same page. I have 3 different listboxes on a form, their named id's are: "strike", "grapple", and "strength". I have a span tag named id as: "pa". I Have a variable which is constant and named $totalValue and its vale is: 30, I have another variable named: $availableValue which will get its initial value from $totalValue. What I want to do is this, a user will choose his/her first list box. When the uses clicks the arrow on the listbox it drops down filled with values to choose from, these values come from the $availableValue variable and should be displayed as: 1,2,3,4,5,etc,etc,etc, after the user makes their selection the value of $availableValue is decreased by the amount of the user's selected choice and the value of the $availableValue is displayed on the html part of the page in a span tag.
The user will then choose his/her second listbox, upon clicking that arrow the listbox drops down displaying the REMAINING values from $availableValue variable and displays them as: 1,2,3,etc,etc,etc, after the user makes their selection the value of $availableValue is decreased by the amount of the user's selected choice and the value of the $availableValue is displayed on the html part of the page in a span tag. The user will then choose the last listbox, and upon clicking its arrow the list drops down with the LAST REMAINING values from $availableValue and will be displayed as: 1,2,etc,etc, after the user makes their selection the value of $availableValue is decreased by the amount of the user's selected choice and the value of the $availableValue is displayed on the html part of the page in a span tag.
The user should be able to choose which ever listbox he/she wants as their first listbox. So for argument's sake lets say the user chooses listbox "grapple" first, but of course the user could have chosen any of the 3 listboxes first, but he/she choose "grapple" first. The "grapple" listbox should fill with values 1 to 30, ex: 1,2,3,4,up to 30, the user selects value 5 from "grapple", the $availableValue variable will decrease by 5 and the value of $availableValue is displayed in a span tag. The user then chooses listbox "strength", its values should be filled and displayed with values from 1 to 25, the user selects 8 from "strength", the $availableValue variable decreases by 8 and the value of $availableValue is displayed in a span tag. Finally the user selects listbox "stamina", it listbox displays the values from 1 to 17, the user selects 17 from "stamina" and the $availableValue variable decreases by 17 and the value of $availableValue is displayed in a span tag. All this should happen BEFORE I submit the form via php code.
The code below, including the html, is ALL on one page named: createfighter.php
<?php
$totalValue = 30;
$availableValue = $totalValue;
$action = $_REQUEST['action'];
$strike = $_POST['strike'];
$grapple = $_POST['grapple'];
$strength = $_POST['strength'];
?> .....
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Jan 21, 2011
I am trying to get all my input values from this table:
I am trying to get all the input controls value from "myid_input_tr", anyone knows how ? Should be not very hard.
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Aug 23, 2010
I'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]....
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