how to validate if a checkbox has been checked or not

I have a bunch of checkboxes and if a certain checkbox is checked, I want to show extra fields.

When I use getOptions like the following

var countryOptions = item.getOptions();
var countrySelected = countryOptions[parseInt(item.getValue())].value;

countrySelected gives me a comma delimited list of checkboxes selected like 0,1,2. However when I uncheck checkbox at index number 2 and call this function, the code returns 0,1

I know in JavaScript, you can do something like the following

for (var i = 0; i < countryOptions.length; i++)
{
if (countryOptions.checked)
alert("Value selected " + countryOptions.value);
else
alert("Value not selected " + countryOptions.value);

}

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Comments

nipper

if you getValue() of the item, it returns an array of integers of the choices select.

alisyedj

I have used the following code. It seems to work fine when I am checking bunch of check boxes.

For e.g. if I check first three check boxes, getValue() returns 0,1,2. However when I uncheck check box number 3, getValue() only returns 0,1.

function CountrySelection(item)
{
var CountryOptionVal = item.getValue();
alert("Option selected " + CountryOptionVal);
}

Adam Stoller

I have used the following code. It seems to work fine when I am checking bunch of check boxes.

For e.g. if I check first three check boxes, getValue() returns 0,1,2. However when I uncheck check box number 3, getValue() only returns 0,1.

function CountrySelection(item)
{
var CountryOptionVal = item.getValue();
alert("Option selected " + CountryOptionVal);
}

Is there still a question here - or does this resolve your initial problem?

nipper

it should resolve your problem as it is working as intended

new_report_1.rptdesign

alisyedj

It hasn't resolved the problem because i need to know if a certain checkbox is checked or not. Right now the way getValue() is behaving, it does not give the index of the checkbox when I uncheck it.

Adam Stoller

It hasn't resolved the problem because i need to know if a certain checkbox is checked or not. Right now the way getValue() is behaving, it does not give the index of the checkbox when I uncheck it.

Uhm - if you know how many options there are, and you know which ones are checked - you should be able to figure out which ones are not checked -- or is that beyond your abilities?

alisyedj

Yeah i know how to program thank you for your insight. I am just looking for a better way of doing this.

nipper

So you are just lazy ? This is maybe 6 lines of JavaScript.

Adam Stoller

Yeah i know how to program thank you for your insight. I am just looking for a better way of doing this.

Thinking about this a bit more - perhaps you can make use of the

oldValue

information - e.g.:

function checkboxChangedHandler(item) {
   var oldVal = item.oldValue + "";
   var newVal = item.getValue() + "";
   // From here you can either do regex matches on the strings
   // or perhaps split them into an array, create a hash, etc.
}

Using the above you should be able to determine which checkbox just got checked or unchecked.

alisyedj

Thanks ghoti !