Validating An Array Of Checkboxes

Mar 14, 2006

What am I doing wrong here? Forgive me if it's blindingly obvious, but I can't get this to work:

HTML Code:

<html>
<head>
<title>test</title>
<script type='text/javascript'>

function editPhotos(numPhotos) {

for(var i = 0; i < numPhotos; i++) {

if(document.forms.boxOrder.photos[i].checked == true) {
alert('yes');
} else {
alert('no');
}
}

}
</script>
</head>
<body>

<form name='boxOrder'>
<input type='checkbox' name='photos[0]' /><br />
<input type='checkbox' name='photos[1]' /><br />
<input type='checkbox' name='photos[2]' /><br />
<input type='checkbox' name='photos[3]' /><br />
<input type='checkbox' name='photos[4]' /><br />
<input type='button' name='edit' value='Edit Selected'
onClick='javascript:editPhotos(5);' />
</form>
</body>
</html>

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Validating Checkboxes By Value

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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Validating Multiple Checkboxes In Form?

Feb 17, 2009

I have some checkboxes in a form that I'd like to validate (check to ensure that at least one has been ticked):
HTML Code:
<input type="checkbox" name="response[]" value="answer1" />answer1
<input type="checkbox" name="response[]" value="answer2" />answer2
<input type="checkbox" name="response[]" value="answer3" />answer3
<input type="checkbox" name="response[]" value="answer4" />answer4

The javascript below only works if I change my checkbox names to name="response" rather than name="response[]".
Code:
function validateform(){
var success = false;
for (i = 0; i < document.surveyform.response.length; i++){
if (document.surveyform.response[i].checked){
success = true;
}} return success;
}

I need to pass along multiple checkbox responses to my PHP script and therefore need to keep checkboxes named name="response[]". When I do this, I get the error "document.surveyform.response has no properties"
What change I can make to the javascript so that I can name my checkboxes name="responses[]" ?

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Aug 11, 2009

I have two arrays that are tied together Ink1Data[][InkID] and Ink1Data[][Ink1Desc]. I also have this Javascript code to validate it:
var chksink1 = document.getElementsByName("Ink1Data[][InkID]");
for (var i = 0; i < chksink1.length; i++) {
switch (chksink1[i]) {
case (chksink1.value=1);
var i1Desc = "Ink1Data["+i+"][Ink1Desc]";
if (validate_required(i1Desc,"Please fill in a trim size.")==false)
{i1Desc.focus();return false;}
break;
case (chksink1.value=2);
var i1Desc = "Ink1Data["+i+"][Ink1Desc]";
if (validate_required(i1Desc,"Please fill in folding instructions.")==false)
{i1Desc.focus();return false;}
break;
case (chksink1.value=3);
var i1Desc = "Ink1Data["+i+"][Ink1Desc]";
if (validate_required(i1Desc,"Please fill in scoring instructions.")==false)
{i1Desc.focus();return false;}
break;
}}
Basically, I want to count how many are in the array (will be the same number for both) and then depending on the value of the first array, validate the second and kick an appropriate error if necessary. It should be pretty easy, but I can't seem to get the code to work.

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I want to validate an HTML form, that have array filed names. For example

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I need this as a program require contact us form in this format (sunshop).

if(document.formname.contact[name].value.length==0) { alert('You must enter name'); return false; } But not working. Code:

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Aug 15, 2011

In our ordering system, we have to type in various values for several items at a time. This means in one single form, for one order, we could be typing in a batch number 4 or 5 times. I can valiadate this easy enough with Javascript when there is only 1 line. But what if there is more than 1?

With PHP you add [] to the end of the form element's name. But how do I get javascript to work with this?

Code:

Basically, the batch number, expiry date and pallet/box number is mandetory. If they arn't entered, it needs to fail (return false). It doesn't seem to be doing anything, just moving on to the next part which is checking other parts of the form which isn't repeated.

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Nice module, but I can't get it too work.

Code:

/**
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*

[code]....

but the script alerts me nothing?

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Mar 12, 2008

I need to be able to get all my checkboxes which are in an array and which have the name:

name="personselected[]"

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I have looked around and can only find examples of where the checkboxes are not in arrays. The closet I have found to what I need is below but it won't work due to my checkboxes being an array.

Code:

function checkAll(field) {
for (i = 0; i < field.length; i++)
field[i].checked = true;

[Code].....

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Jan 15, 2006

In my HTML, I have several of the following:

<input type='checkbox' name='right[]' id='right[]' value=&#390;' />

All are the same except the value is set differently for each one. The
reason for the [] is so I can access the checkbox values as an array on
the processing page (when clicking 'Submit');

However, I want my Javascript code to examine these objects first. My
onclick event handler function (below) is called (I get the 'hi there'
popup), but it does nothing afterward (i.e., neither 'checkbox' alert
appears, and the handler, strangely, seems to return 'true').

I suppose my problem is that I am not specifying the checkbox array
properly. I tried several variations, but I've been working on this
problem alone for several hours and am getting nowhere. Code:

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Sep 17, 2011

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[code]....

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Nov 11, 2009

Is there any option not to use an array in counting the checks on checkboxes? Code will be integrated into an ORACLE database. I'm trying to catch up same output as stated below;but whenever i integrate it to Oracle database it doesnt work. I am a beginner in PHP programming.

<html>
<head>
<script type="text/javascript">
function countCheckboxes ( ) {
var form = document.getElementById('testForm');
var count = 0;

[Code]...

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I have a pretty simple survey form, with 5 checkbox answers, one of them being "None of the Above". All 5 are part of the same question1[] array. My goal is to have a function that unchecks the other 4 boxes when None of the Above is checked. The problem is that since None of the Above is part of the question1 array, it unchecks itself. So how do I separate this None of the Above option? After all, it is still a valid answer to question 1, so I don't want it to sit in a different array just because...

Here's what I have now:
Java:
function SetValues(Form, CheckBox, Value){
var objCheckBoxes = document.forms[Form].elements[CheckBox];
var countCheckBoxes = objCheckBoxes.length;
for(var i = 0; i < countCheckBoxes; i++)
objCheckBoxes[i].checked = Value;
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HTML:
<input id="question1" name="question1[]" type="checkbox" value="Answer 1"> 1<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 2"> 2<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 3"> 3<br>
<input id="question1" name="question1[]" type="checkbox" value="Answer 4"> 4<br>
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Code JavaScript:
<script>
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i.e:

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Code HTML4Strict:
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