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Show/Hide with Multiple Radio Buttons

I am very new to building forms with js. I copied and applied a bit of code to get fields to pop up depending on the Radio button I select. This works great for two radio buttons, but my issues is that I want to include several (5+) and would like to reset the fields with every change.
I was thinking I can input additional code to reset all fields "onchange" but I can't get this piece of code to work... here is what I copied and modified for my use:
works great with 2 buttons as designed:
{
toggleSelectionFields: function() {
var isLaptop = ca_fdIsSelectRadio('showhide','group','short');
if (isLaptop) {
ca_fdHideField('showhide','longfields');
ca_fdShowField('showhide','shortfields');
} else {
ca_fdHideField('showhide','shortfields');
ca_fdShowField('showhide','longfields');
}
}
}
Here is what I tried to do:
{
toggleSelectionFields: function() {
Var discovery = ca_fdIsSelectRadio('phone','deskphone4610','selectproblem','SelectIssue','discovery');
Var headset = ca_fdIsSelectRadio('phone','deskphone4610','selectproblem','SelectIssue','headset');
Var fac = ca_fdIsSelectRadio('phone','deskphone4610','selectproblem','SelectIssue','feature');
Var calls = ca_fdIsSelectRadio('phone','deskphone4610','selectproblem','SelectIssue','calls');
if (discovery)
{ca_fdShowField('phone','deskphone4610','selectproblem','discovermode')}
if (headset)
{ca_fdShowField('phone','deskphone4610','selectproblem','headset')}
if (fac)
{ca_fdShowField('phone','deskphone4610','selectproblem','feature')}
if (calls)
{ca_fdShowField('phone','deskphone4610','selectproblem','calls')}
}
}
}

This appears to be a JavaScript question (not Java) and related to a particular framework (CA Service Catalog), so questions about how to do things with particular CA functions would probably be best answered on the CA Service Management Global User Community message boards.
As a general logic/JavaScript question, though, you need to hide the fields you don't want to see in addition to showing the ones you do want to see. Notice that your first example calls ca_fdHideField to hide one set of fields, then ca_fdShowField to show the other. If you don't want to duplicate a lot of code, you could hide them all before the if statements, then just show the one that corresponds with the radio button that was selected:
ca_fdHideField(...)
ca_fdHideField(...)
...
if (discovery) {
...
}
etc.

How can I tell if the checkboxes are checked?

I need to be able to tell if the checkboxes are checked to do some basic validation. Problem: I don't have access to the PHP generating this. There is no class added, or the basic checked=checked that most forms have. What's the easiest way to target the checked boxes?
http://www.inpresence.in/event-registration?ee=4
EDIT: freak out!! here's the code, i just need to target the checked boxes, everything else is working. the :checked method of jquery uses checked=checked within the checkbox, which isn't there.
$(document).ready(function(){
//when the submit button is clicked...
$("input.btn_event_form_submit").click(function(){
//find the value of the drop down with one evening or four evenings
var priceOption = $("#price_option-4").val();
//match a string ending with "one evening" as the first numbers will be randomly generated by php
var oneEvening = /^\d{2}\|One Evening$/.test(priceOption);
//match a string ending with "four evenings" as the first numbers will be randomly generated by php
var fourEvenings = /^\d{2}\|Four Evenings$/.test(priceOption);
//HOW DO I GET THE CHECKED BOXES?!
var checkedBoxCount = $('#dates-1351733097 .valid').is(':checked').length;
//if one evening is selected make sure the checked boxes count does in fact equal one
if(oneEvening && checkedBoxCount != 1){
//if it doesn't alert the user and return false
alert('You must select one date');
return false;
}
//if one evening isn't selected, four is. make sure the count does indeed in 4
else if (fourEvenings && checkedBoxCount != 4){
//if it doesnt alert the user and return to the form
alert('You must select four dates');
return false;
}
//else, everything checks out!
else {
return;
}
});
});

Using this JavaScript code you can check if a checkbox is checked:
var isChecked = document.getElementById("my-checkbox").checked;
Or using jQuery:
var isChecked = $('#my-checkbox').is(':checked');
EDIT: Try this and tell me if it works:
var checkedBoxCount = $('#dates-1351733097 .valid:checked').length;

Have you tried using jquery to resolve this?
http://jquery-howto.blogspot.co.uk/2008/12/how-to-check-if-checkbox-is-checked.html
$('#edit-checkbox-id').is(':checked');

use the jquery :checked selector. http://api.jquery.com/checked-selector/

This will give you a boolean in javascript of what you want:
document.getElementById("Nov.12-4_1").checked
You can view source and find the elements to view whatever id's they have.
Other answers: the OP didn't specify that he wanted a jquery answer. If he hasn't used jquery for anything up to this point. I think adding it just for this would be a tad overkill.

Disable Applet button using javascript

I would like to disable a button
<BUTTON name="Next Page" onClick="Next()" VALUE="NextPage">NextPage</button>
based on a javascript variable
var opening = 0;
function Next()
{
var currentdoc = viewONE.getDocIndex();
if (currentdoc == 5)
{
**[DISABLE BUTTON]**
}
what is the javascript code please?
Background information:
Simply browsing through documents using a next and previous buttons. on the first document i want the "previous" button greyed out and on the the last document i want the "next" button greyed out.
Appologise for any incorect terms, newb and never asked this type of question before.
you are welcome to correct my term in a constructive way... need to learn.

Sam's solution is good and will disable the action of the button but won't disable it functionally.
You can disable the input button by changing changing the "disabled" attribute, but you really need to give your button a valid identifier first (I wouldn't even want to let jQuery select it by name due to the space).
jQuery would look something like this:
$('#yourbuttonid').attr('disabled','disabled');
Regular Javascript would be the following:
document.getElementById('yourbuttonid').disabled = true;
Here's an example on JSBin.

All you need to do is:
var opening = 0;
function Next()
{
var currentdoc = viewONE.getDocIndex();
if (currentdoc == 5)
{
return; //This will end the function immediately.
}
}
In terms of greying out buttons, can you not add / remove classes to show different versions of the buttons? We would need more to see your html, and what you have tried so far to help further.
Tutorial on return

Need help with javascript regarding radiobuttons

I want to disable the radiobutton the second time it is clicked..I want to put some code in the head..that when a radiobutton is clicked the second time,, it isnt marked anymore..
I want to check and uncheck the radiobutton with each click.
Note: I generate 20 radiobuttons dynamically
Take into account that it is a Radiobutton that is run on the server:
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.radiobutton.aspx
UPDATE: This is the only event that the RadioButton (asp WebControl run at="server") has:
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
var rad = (CheckBox)sender;
if (rad.Checked)
{
rad.Checked = false;
}
}
I can uncheck it after each post back..but unless a post back doesnt happen, i cant select and deselect it.. Thats the problem!! :(

I think you should keep with the standard use of RadioButtons, by saying this - use CheckBoxes instead, and clear all checkboxes if a different one is clicked...so when a checkbox is clicked the second time the standard uncheck will occur.

if i get you right then
all u need is a flag attribute of how many times u have clicked on the radio button and each time u click the radio the attribute increased by 1 and check the attribute every click if its 2nd time then disable the radiobutton
so you need to generate ur radiobuttons like this
<input type='radio' onclick='radioClick(this);' how_many_clicked='0' id='whatever id u need' name='whatever name u need' />
and create ur function in the head like the following
function radioClick(e) {
var flag = e.getAttribute('how_many_clicked');
var times = Number(flag);
times += 1;
e.setAttribute('how_many_clicked', times.toString())
if (times > 1) {
e.checked = false;
e.setAttribute('how_many_clicked', "0");
}
else {
e.checked = true;
}
}

Id create an empty array. For every radiobutton you create, add its ID to the array as the key and set its value to 0. This will be the count for the specific button. Whenever a radiobutton is clicked, check the buttons ID against the array, if its less than 2, increment it. If not, disable the current button.
EDIT : didn't realize you were checking if it was already checked, thoguht it was the number of times checked.
$("#id").is(":checked")
Should suffice
Another note ...if all you're doing is disabling an element from being accessed by the user, you should handle this event on the client side. You'll be using unnecessary server callback for functionality easily achievable via javascript. Use jquery click event handlers which can be generic enough for you not to have to use identifiers, making the job that much easier.
Cheers

From HTML Form to XML Tree

I would like to pick some of your brains on this matter...
I've got a large form where there are a lot of multiple selection choices. Some are radio groups and yet others are "select all that apply" checkbox groups.
I'm trying to figure out the best way to translate each of these selections within my XML tree to send to the SQL server.
For radio groups, that's easy... one is selected: option = id #
But for checkboxes, this is a little different... I'd like to stick to sending 1 or 0 for selected or not selected. But checkbox dont have a value and so I have to check to see whether or not it's selected: true or false/yes or no.
What do you think would be the best way to convey whether or checkbox within a group of checkboxes has been selected within the XML tree?

One way (and the simplest) would be to send only those checked and the server will assume the others are not checked. The other way would be to iterate over your form elements, select the checkboxes and see if they are checked or not, one by one. Something like:
var checkboxes = []; // assoc array of all checkboxes
function formValidate(form)
{
var list = form.getElementsByTagName('input')
for (var i in list)
{
var elem = list[i];
if (elem.type == 'checkbox')
checkboxes[elem.name] = elem.checked;
}
return true; // assuming this is an onSubmit event
}
and in your HTML:
<form onSubmit="return formValidate(this)" ...