Loop Through Checkboxes

Jul 20, 2005

Browser: IE5+

I have a form with an unknown number of checkboxes (the page is generated
by a server-side script). I need to loop through those checkboxes, test
whether the name of each checkbox starts with a known string and, if it
does, clear that checkbox.

I've tried just about everything that I can think of, but to no avail.

Can someone tell me how to loop through the checkboxes of a form?

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Recursive Function With For Loop, For Loop Is Breaking When Calling Itself

Jan 22, 2011

I have been looking at this code for two evenings now, and rewrote it 4 times already. It started out as jQuery code and now it's just concatenating strings together.

What I'm trying to do: Build a menu/outline using unordered lists from a multidimensional array.

What is happening: Inside the buildMenuHTML function, if I call buildMenuHTML, the for loop only happens once (i.e. only for 'i' having a value of '0'.) If I comment out the call to itself, it goes through the for loop all 3 times, but obviously the submenus are not created.

Here is the test object:

test = [
{
"name" : "Menu 1",
"url" : "menu1.html",
"submenu" : [

[Code].....

'Menu 2' and 'Menu 3' don't show up! I'm sure it's something small that I'm overlooking.

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So if i have 5 Tabs then Tab 1, when clicked, should call DefaultTabClick(0) and so on rather than always using 4 for any of the tabs.

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[Code]...

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Mar 6, 2011

As you can see from the code and the output, it will attempt to write to the browser how many moves, but only '0'.

function rollDie()
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return Math.floor(Math.random() * 6) + 1;
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/*
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*
*function takes two arguments[CODE]...

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Aug 2, 2009

I have the HTML all laid out for what I'm trying to do. I want to have the user be able to select any 10 checkboxes, and keep a tally of how many are selected, and how many are left to go. Should I do this with jQuery?

Code HTML4Strict:
Select any 10 cds for $20<br />
You have chosen $selected CD's<br />
You have $remaining CD's left</p>

[Code].....

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Nov 12, 2010

I am doing some studying and we was to create a small loop using either the for loop, while loop or do while loop. I chose to do the for loop because it was easier to understand, but I want to know how to do the same using the while loop. Here is the for loop I have, but I cant figure out how to change to while loop.

for (var i = 0; i < 5; ++i)
{
for (var j = i; j < 5; ++j)
{

[Code]....

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function checkForm(form)
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var len = form.elements.length;[code]....

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Sep 7, 2005

I currently have a table with a number of cells. In certain cells I have checkboxes that users select to submit the checkboxes values. What I want to do is get rid of the checkboxes and just have the user click on the cell to select a value. I have worked out the way to change the background color of the cell to show what has been selected but is it possible to do what I want with Javascript.

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Jan 31, 2006

I have a form wherein there are around 200-300 rows of homogenous
data, each having around 30 input fileds of its own.So totally, there
are more than 6000 input fields . Now, when the user submits this page,
i need to loop through the checkboxes and identify the ones that are
checked. I can't use the getElementsByName() since the checkbox names
are different. I'm using getElementsByTagName("input"). Because of the
huge amount of data, this method takes around 4-5 secs to evaluate
before submitting the form. Is there some way to get the collection of
checkboxes without having to loop through all the input fields?

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Jul 19, 2007

I have a form where I have embedded a table. Inside a column in each row is a checkbox. I want:

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Nov 24, 2009

I found a nice script that will check all check boxes on a page but the id's of the boxes are generated with a php foreach loop and I'm kind of stuck.Here's the javascript:

PHP Code:
function checkAll(field)
{ 

[code]....

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Sep 22, 2009

I have a few checkboxes in a form. Some of them work independently, but some make the others go on and off. Specifically the lower ones are controlling the upper ones.

<td>
<input type="checkbox" name="weddingitem1" value="Toppers" id="Toppers"/><label for="Toppers" >Toppers<br />
<input type="checkbox" name="weddingitem2" value="Champers" id="Champers"/><label for="Champers" >Champers<br />
</td>

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Jan 15, 2010

I have a form with a number of checkboxes. The 1st one is "Select All". When this checkbox is ticked I would like to disable all others. When the "Select All" checkbox is unticked, all checkboxes should be enabled.

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Aug 31, 2011

I'm currently working on a page working with separate categories and a whole lotta check boxes. My objective is to have one checkbox deselect the other checkboxes in its category without interfering with the rest. How would I go about doing this assuming the id tag is already in use and differs per tag? I was thinking about cycling through all checkbox tags and sorting them out via class but I'm looking for something possibly more efficient.

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I have 2 checkboxes.How would I control one from the other?

Eg.
[ ] Option A
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[code]....

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Mar 6, 2006

I have a form. It has several products. Each product has a price listed. Each product can be selected via a checkbox.

What I would like to do is have the sum of each selected product, added in total at the bottom of the form.

I would prefer to use javascript/dhtml for this, I don't want anything complex, just something to add to the page and have it display the total live as the customer checks/unchecks a product.

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May 3, 2006

I found some simple code to get a better understanding of validating checkboxes. It validates the checkboxs by their name. Is it possible to validate the checkboxes with the same name but different values? The name of the checkboxes will be an array containing the values of the checkboxes selected.

I have my html like so:
<input type="checkbox" name="stuff[]" value="1" onClick="countChoices(this)">
<input type="checkbox" name="stuff[]" value="2" onClick="countChoices(this)">
<input type="checkbox" name="stuff[]" value="3" onClick="countChoices(this)">

And the javascript where I edited "box1=", "box2=", "box3=" is like so:
function countChoices(obj) {
max = 2;

box1 = obj.form.1.checked;
box2 = obj.form.2.checked;
box3 = obj.form.3.checked;

count = (box1 ? 1 : 0) + (box2 ? 1 : 0) + (box3 ? 1 : 0);

if (count > max) {
alert("You can only choose up to " + max + " choices!
Uncheck an option if you want to pick another.");
obj.checked = false;
}}

How do I correctly create box1, box2, box3, in this case?

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Sep 29, 2004

I know there is a lot of free, easy-to-find scripts that will check all checkboxes in a form, however, all of the working ones I found require you to pass the name of the checkbox. My checkboxes are being generated in .NET so they all have a unique name.

Is there a simple way to loop through every form element and check it if it is a checkbox and than either check it or uncheck it based on a passed value?

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Apr 24, 2005

I have code that basically will bold a hyperlink when a check box is checked. For example I have checkboxes that say;

Eggs []
Waffles []
Ham [X]
Wheat Bread[X]
White Bread[]
Cheese[X]

When those boxes are checked it will bold links as follows

Breakfast sandwich
Lunch Sandwich
Dinner Sandwich

What I'd like to do is while the check boxes are being checked it'll highlight those hyperlinks that fall into the checked values. When it reaches a value that it doesn't fall into it will unbold itself. So far I have code that when a a certain combo of boxes is checked, it'll highlight, but like I said. I'd like to keep the links highlighted until it reaches a condition that'll make it unbold. Code:

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Sep 15, 2001

I need a script to select and deselect all checkboxes in a form, but it must allow me to name the checkboxes whatever[] for PHP reasons.

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Jul 17, 2006

I have been working on this for the last couple days and have made a lot of headway, but am still stuck on a spot. I have a group of checkboxes on my form that allow the user to select which items apply. I want to verify that at least one checkbox in each group has been selected before allowing them to continue. PHP requires the naming of the arrays to include the [] but jsp (for verification) doesn't like it. I read about and used the .elements method to overcome part of that problem so my for loop is now executing for the number of items in my group:

for (var i=0; i<document.form1.elements['dining_out1[]'].length; i++)

however my if statement won't execute:

if (document.form1.elements['dining_out1[i]'].checked)

even if I have checked ALL checkboxes. I have tried all the different methods I can think of to test for a checked value on each item in the array, but I can't quite figure out what I am missing.

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Multyple Checkboxes

Apr 25, 2007

How to detect what checkboxes are checked, when there are more checkboxes, for example selecting comments to be deleted.

Would something like this work:
get all tags with "input" tag name and then find all checkboxes by id that would consist from for example: del_"commentID"

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Jan 15, 2003

I am coding a quiz that will have 40 checkboxes that the user will be able to check.

(Right now I am trying to get this code to work with 4 and will change it to 40 once I figure out my problem.)

What I want to do is count up the amount of checked boxes and display it to the user.

I know I could do this with copying and pasting a line of code over and over again, but I thought it would be much smarter to use a loop and cut the JS down to only a few lines.

--A temporary file is set up at:

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Feb 25, 2011

I have js on a form page for users to be able to select all check boxes for classes to enter in a dogs show but I want to be able to offer the facility to select just classes on specific days as well and I don't know how to do it.The form source code for each class to select looks like this:

<input type="hidden" name="day_id_normal[12]" value="5" />
<input type="hidden" name="day_id[12]" value="5" />
<input type="checkbox" name="class_number[]" id="gradeclass" value="12" />

[code]....

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