Getting the Values of CheckBox(es) Selected

[rishabhshrivastava]

Hey All,
Can someone suggest me a way to get the values of CheckBox(es) selected
in a CheckBoxList control using JAVASCRIPT.
I am pasting my current code gere but its not working need some
suggestions pls.

function CheckBoxList(cn trlName)
{
var cntrlValue = listValuesCheck Box(cntrlName);
return cntrlValue ;
}
function listValuesCheck Box(objectName)
{
var list = "";
for (var i=0; i<objectName.le ngth;i++){
if (objectName.Opt ions[i].selected = true){
list += objectName.Opti ons[i].value+ '~';
}
}
return list;
}

[Janwillem Borleffs]

ri************* ***@gmail.com wrote:

if (objectName.Opt ions[i].selected = true){

This is an assignment, and therefore, will always evaluate to TRUE.

Use one of the following forms instead:

if (objectName.Opt ions[i].selected == true){

if (objectName.Opt ions[i].selected){
JW

[RobG]

ri************* ***@gmail.com wrote:

Hey All,
Can someone suggest me a way to get the values of CheckBox(es) selected
in a CheckBoxList control using JAVASCRIPT.
I am pasting my current code gere but its not working need some
suggestions pls.

function CheckBoxList(cn trlName)
{
var cntrlValue = listValuesCheck Box(cntrlName);
return cntrlValue ;
}
function listValuesCheck Box(objectName)
{
var list = "";
for (var i=0; i<objectName.le ngth;i++){
if (objectName.Opt ions[i].selected = true){

Careful with case, a select element has an options collection, not an
Options collection.

list += objectName.Opti ons[i].value+ '~';
}
}
return list;

Presuming that objectName is a reference to a select element, there is
no need to loop through all the options. The select element's
selectedIndex property will tell you which one is selected. Replace
the entre function with:

return '~' + objectName.opti ons[objectName.sele ctedIndex].value;
Modern browsers will be happy with:

return '~' + objectName.valu e;

}

--
Rob

[Danny]

Check at http://www.javascriptkit.com/javatut...diocheck.shtml on how to get the .checked
checkboxes :) .

Danny

[rishabhshrivastava]

Hey Rob,
When I replaced it with the line you told me JavaScript thows the Error
Below:-

Microsoft JScript runtime error: 'options' is null or not an object

Please Advise.

Thanks
RobG wrote:

ri************* ***@gmail.com wrote:

Hey All,
Can someone suggest me a way to get the values of CheckBox(es) selected
in a CheckBoxList control using JAVASCRIPT.
I am pasting my current code gere but its not working need some
suggestions pls.

function CheckBoxList(cn trlName)
{
var cntrlValue = listValuesCheck Box(cntrlName);
return cntrlValue ;
}
function listValuesCheck Box(objectName)
{
var list = "";
for (var i=0; i<objectName.le ngth;i++){
if (objectName.Opt ions[i].selected = true){

Careful with case, a select element has an options collection, not an
Options collection.

list += objectName.Opti ons[i].value+ '~';
}
}
return list;

Presuming that objectName is a reference to a select element, there is
no need to loop through all the options. The select element's
selectedIndex property will tell you which one is selected. Replace
the entre function with:

return '~' + objectName.opti ons[objectName.sele ctedIndex].value;
Modern browsers will be happy with:

return '~' + objectName.valu e;

}

--
Rob

[Jim Land]

ri************* ***@gmail.com wrote in news:1153687584 .732898.55360
@i42g2000cwa.go oglegroups.com:

Can someone suggest me a way to get the values of CheckBox(es) selected
in a CheckBoxList control using JAVASCRIPT.

Hi,

Note thad an option in a select control has the * selected * property.

Checkboxes and radio buttons have the * checked * property.

[RobG]

ri************* ***@gmail.com wrote:

Hey Rob,

Please don't top post, reply below trimmed quotes.

When I replaced it with the line you told me JavaScript thows the Error
Below:-

Microsoft JScript runtime error: 'options' is null or not an object

Probably because I expected you to be using a select element rather
than a set of checkboxes. Your original post was somewhat confusing,
here is an example of getting the selected checkboxes from a set:

<script type="text/javascript">

function listValuesCheck Box(checkBoxRef )
{
var list = [];
for (var i=0, len=checkBoxRef .length; i<len; i++){
if (checkBoxRef[i].checked){
list.push(check BoxRef[i].value);
}
}
alert(list.join ('\n'));
}

</script>

<form action="">
<label for="cb01"><inp ut type="checkbox" id="cb01"
name="cbSet1" value="cb 01">cb 01</label><br>
<label for="cb02"><inp ut type="checkbox" id="cb02"
name="cbSet1" value="cb 02">cb 02</label><br>
<label for="cb03"><inp ut type="checkbox" id="cb03"
name="cbSet1" value="cb 03">cb 03</label><br>
<input type="button" value="Show checked"
onclick="listVa luesCheckBox(th is.form.cbSet1) ;">
<input type="reset">
</form>
If you are trying to create a delimited list, a joined array is simpler
(and much faster in IE) than concatenating strings using the "+="
compound operator.
--
Rob