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Multi step form (no next button) with conditional logic

I'm using a multi-step form from this question and answer on StackOverflow
To add to this form;
1.) how can it work with conditional logic, as in, if the user's input radio first question is to choose ppc or organic, if they select organic then only certain "hidden" divs with "organic" class show, and the PPC related divs don't. But the other neutral hidden divs will show later. I think the problem is they are all hidden already so the first script seems to override the second javascript that looks for "if this... else".
2.)A second problem with the multi-step form without buttons above is you cannot tab to a second or third input text field on the last page. It just blanks out.
<script type='text/javascript'>
$(document).ready(function(){
$('#traffic').on('change', function() {
if ( this.value == 'organic' )
{
$(".org").show();
$(".ppc").hide();
}
else
{
$(".org").hide();
$(".ppc").show();
}
});
});
</script>
<script type="text/javascript">
document.querySelector("form").onchange = function(e) {
var currentFormPage = e.target.parentElement.parentElement;
console.log(e.target.name + ": " + e.target.value);
if(currentFormPage.nextElementSibling) {
currentFormPage.classList.add("hidden");
currentFormPage.nextElementSibling.classList.remove("hidden");
}
}
</script>
<form>
<h2>Free Google Ads Audit!</h2>
<div>
<h4>Do you want Organic or PPC traffic right now?</h4>
<label class="radio-choice" style="display: none"><input type="radio" name="traffic" id="traffic" value="" checked></label>
<label class="radio-choice"><input type="radio" name="traffic" id="traffic" value="organic">Organic is the best</label>
<label class="radio-choice"><input type="radio" name="traffic" id="traffic" value="ppc">PPC is better</label>
</div>
<div class="hidden ppc">
<h4>What's your monthly ads budget?</h4>
<label class="radio-choice" style="display: none"><input type="radio" name="whats_your_monthly_ads_budget" value="" checked></label>
<label class="radio-choice"><input type="radio" name="whats_your_monthly_ads_budget" value="2000-10000">2,000 - 10,000</label>
<label class="radio-choice"><input type="radio" name="whats_your_monthly_ads_budget" value="11000-50000">11,000 - 50,000</label>
<label class="radio-choice"><input type="radio" name="whats_your_monthly_ads_budget" value="51000-100000">51,000 - 100,000</label>
<label class="radio-choice"><input type="radio" name="whats_your_monthly_ads_budget" value="+100000">100,000+</label>
</div>
<div class="hidden ppc">
<h4>Have you ever had an Adwords account?</h4>
<label class="radio-choice" style="display: none"><input type="radio" name="adwords" value="" checked></label>
<label class="radio-choice"><input type="radio" name="food" id="adwords" value="2-3 years">Yes</label>
<label class="radio-choice"><input type="radio" name="food" id="adwords" value="5 years">No</label>
</div>
<div class="hidden org">
<h4>How much experience do you have?</h4>
<label class="radio-choice" style="display: none"><input type="radio" name="experience" value="" checked></label>
<label class="radio-choice"><input type="radio" name="exp" id="experience" value="2-3 years">2-3 years</label>
<label class="radio-choice"><input type="radio" name="exp" id="experience" value="5 years">5 years</label>
</div>
<div class="hidden">
<h4>What are your Goal(s)?</h4>
<label class="radio-choice" style="display: none"><input type="radio" name="what_are_your_goals" value="" checked></label>
<label class="radio-choice"><input type="radio" name="what_are_your_goals" value="Lead Generation">Lead Generation</label>
<label class="radio-choice"><input type="radio" name="what_are_your_goals" value="Brand Awareness">Brand Awareness</label>
<label class="radio-choice"><input type="radio" name="what_are_your_goals" value="Online Sales">Online Sales</label>
<label class="radio-choice"><input type="radio" name="what_are_your_goals" value="Sign-ups">Sign-ups</label>
</div>
<div class="hidden">
<h4>Success! You qualify for a Free Google Ads Audit, enter your email to confirm!</h4>
<input type="text" placeholder="Full name">
<input type="email" placeholder="Company Email">
<input type="button" name="email" value="Download">
</div>
</form>

This should work how you want it. Unfortunately, jquery invokes the first id as they're unique so if you want multiple elements to do the same functionality you'll have to make them all classes.
<html>
<head>
<title>Test</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<style>
.hidden {
display: none;
}
</style>
<script>
$(document).ready(function() {
$('.traffic').on('change', function() {
if (this.value === "organic") {
$(".org").show();
$(".ppc").hide();
} else {
$(".org").hide();
$(".ppc").show();
}
});
});
</script>
</head>
<body>
<form>
<h2>Free Google Ads Audit!</h2>
<div>
<h4>Do you want Organic or PPC traffic right now?</h4>
<label class="radio-choice" style="display: none">
<input type="radio" name="traffic" id="traffic" value="" checked>
</label>
<label class="radio-choice">
<input type="radio" name="traffic" class="traffic" value="organic">Organic is the best </label>
<label class="radio-choice">
<input type="radio" name="traffic" class="traffic" value="ppc">PPC is better </label>
</div>
<div class="hidden ppc">
<h4>What's your monthly ads budget?</h4>
<label class="radio-choice" style="display: none">
<input type="radio" name="whats_your_monthly_ads_budget" value="" checked>
</label>
<label class="radio-choice">
<input type="radio" name="whats_your_monthly_ads_budget" value="2000-10000">2,000 - 10,000 </label>
<label class="radio-choice">
<input type="radio" name="whats_your_monthly_ads_budget" value="11000-50000">11,000 - 50,000 </label>
<label class="radio-choice">
<input type="radio" name="whats_your_monthly_ads_budget" value="51000-100000">51,000 - 100,000 </label>
<label class="radio-choice">
<input type="radio" name="whats_your_monthly_ads_budget" value="+100000">100,000+ </label>
</div>
<div class="hidden ppc">
<h4>Have you ever had an Adwords account?</h4>
<label class="radio-choice" style="display: none">
<input type="radio" name="adwords" value="" checked>
</label>
<label class="radio-choice">
<input type="radio" name="food" id="adwords" value="2-3 years">Yes </label>
<label class="radio-choice">
<input type="radio" name="food" id="adwords" value="5 years">No </label>
</div>
<div class="hidden org">
<h4>How much experience do you have?</h4>
<label class="radio-choice" style="display: none">
<input type="radio" name="experience" value="" checked>
</label>
<label class="radio-choice">
<input type="radio" name="exp" id="experience" value="2-3 years">2-3 years </label>
<label class="radio-choice">
<input type="radio" name="exp" id="experience" value="5 years">5 years </label>
</div>
<div class="hidden">
<h4>What are your Goal(s)?</h4>
<label class="radio-choice" style="display: none">
<input type="radio" name="what_are_your_goals" value="" checked>
</label>
<label class="radio-choice">
<input type="radio" name="what_are_your_goals" value="Lead Generation">Lead Generation </label>
<label class="radio-choice">
<input type="radio" name="what_are_your_goals" value="Brand Awareness">Brand Awareness </label>
<label class="radio-choice">
<input type="radio" name="what_are_your_goals" value="Online Sales">Online Sales </label>
<label class="radio-choice">
<input type="radio" name="what_are_your_goals" value="Sign-ups">Sign-ups </label>
</div>
<div class="hidden">
<h4>Success! You qualify for a Free Google Ads Audit, enter your email to confirm!</h4>
<input type="text" placeholder="Full name">
<input type="email" placeholder="Company Email">
<input type="button" name="email" value="Download">
</div>
</form>
</body>
</html>

How to get values of input

I have a problem i dont know how can i read the value stored in <select><option> </option></select> and from radio buttons here i have my code with js and html
function inport(){
var name = document.getElementById("name").value;
var index = document.getElementById("index").value;
var phone = document.getElementById("phone").value;
var grade = document.getElementById("grade").value;
var session = document.getElementById("session").value;
console.log(name);
console.log(index);
console.log(phone);
console.log(grade);
console.log(session);
}
<form>
<div>
<h1>Details</h1>
<div>
<label>Name</label>
<input type="text" id="name">
</div>
<div>
<label>Index</label>
<input type="text" id="index">
</div>
<div>
<label>Phone</label>
<input type="text" id="phone">
</div>
<div id="grade">
<label><input type="radio" name="groupName" value="5"> 5</label>
<label><input type="radio" name="groupName" value="6"> 6</label>
<label><input type="radio" name="groupName" value="7"> 7</label>
<label><input type="radio" name="groupName" value="8"> 8</label>
<label><input type="radio" name="groupName" value="9"> 9</label>
<label><input type="radio" name="groupName" value="10"> 10</label>
<div>
</div>
<div>
<label>Session</label>
<select id="session">
<option value="checkbox">Decembar</option>
<option value="checkbox">November</option>
<option value="checkbox">Octomber</option>
<option value="checkbox">September</option>
<option value="checkbox">August</option>
<option value="checkbox">July</option>
<option value="checkbox">June</option>
<option value="checkbox">May</option>
<option value="checkbox">April</option>
<option value="checkbox">March</option>
<option value="checkbox">February</option>
<option value="checkbox">January</option>
</select>
</div>
<div>
<input type="button" value="Input student"id="import" onclick="inport();">
</div>
</div>
</form>
When i try to console.log my values of grade and session i want to get the number or month selected how can get the value should i change something in my html ? It works fine with first 3 because i just read from <input type="text"> but in other 2 i tried getting the value from radio button and select options. I think you can run this code snipped and see the output if you need more info let me know :).

Add name attribute in input.
JS Code
document.getElementById("show_radio").onclick = function () {
var radio = document.getElementsByName("gender");
var radio_selected;
for (var a = 0; a < radio.length; a++) {
if (radio[a].checked) {
radio_selected = radio[a].value;
}
}
document.getElementById("selected_radio").innerHTML = radio_selected;
}
<form>
<input type="radio" name="gender" value="Male" checked=""> Male<br>
<input type="radio" name="gender" value="Female"> Female<br>
<input type="radio" name="gender" value="I'd rather not inform"> I'd rather not inform
</form>
<button id="show_radio">Show</button>
<p id="selected_radio"></p>

Can't get radio values to send

I am working on making a form that should take the three questions in the form and add them up. If the end value is equal to three it should open call another function called toggletab() when the submit button is clicked. I tried this with it telling me pass or false depending on the value but it won't work. I am not good at JavaScript and it is really confusing to me. It looks like it is running each question separately instead of waiting until the end and calculating them all together. I cannot figure out why this is happening. I also am not sure how to call another function that is in a separate file if someone would know how to do that.
Thank you. This is the HTML
<fieldset class="article">
<legend>Have you had your record expunged before?</legend>
<input type="radio" name="field1" value="0" />
<label>
Yes
</label>
<input type="radio" name="field1" value="1" />
<label>
No
</label>
</fieldset>
<fieldset class="article">
<legend>Do you have any charges pending against you?</legend>
<input type="radio" name="field2" value="0" onclick="getscores2(this)" />
<label>
Yes
</label>
<input type="radio" name="field2" value="1" onclick="getscores2(this)" />
<label>
No
</label>
</fieldset>
<fieldset>
<legend>Is your drivers license suspended?</legend>
<input type="radio" name="field3" value="0" onclick="getscores3(this)"/>
<label>
Yes
</label>
<input type="radio" name="field3" value="1" onclick="getscores3(this)"/>
<label>
No
</label>
</fieldset>
<fieldset id="submitbutton" class="article">
<input type="button" id="submit" value="submit" onclick='answer()' />
</fieldset>
</form>
<p id="totalScore">this is answer </p>
<button onclick = "toggletab()" id="tabButton"><h3>first results</h3>
</button>
<form>
<div id="first" >
<fieldset>
<label>
<fieldset class="article">
<legend>Have you had your record expunged before?</legend>
<input type="radio" name="field1" value="0" />
<label>
Yes
</label>
<input type="radio" name="field1" value="1" />
<label>
No
</label>
</fieldset>
<fieldset class="article">
<legend>Do you have any charges pending against you?</legend>
<input type="radio" name="field2" value="0" onclick="getscores2(this)" />
<label>
Yes
</label>
<input type="radio" name="field2" value="1" onclick="getscores2(this)" />
<label>
No
</label>
</fieldset>
<fieldset>
<legend>Is your drivers license suspended?</legend>
<input type="radio" name="field3" value="0"
onclick="getscores3(this)"/>
<label>
Yes
</label>
<input type="radio" name="field3" value="1"
onclick="getscores3(this)"/>
<label>
No
</label>
</fieldset>
<fieldset id="submitbutton" class="article">
<input type="button" id="submit" value="submit" onclick='answer()' />
</fieldset>
</form>
<p id="totalScore">this is answer </p>
<button onclick = "toggletab()" id="tabButton"><h3>first results</h3>
</button>
<form>
<div id="first" >
<fieldset>
<label>
<legend>Is your arrest record a:</legend>
<input type="radio" name="field4" value="1"
onclick="getscores4(this)"/>
IC 35-38-9-1
</label>
<label>
<input type="radio" name="field4" value="2"
onclick="getscores4(this)"/>
IC 35-38-9-2
</label>
<label>
<input type="radio" name="field4" value="3"
onclick="getscores4(this)"/>
IC 35-38-9-3
</label>
<label>
<input type="radio" name="field4" value="4"
onclick="getscores4(this)"/>
IC 35-38-9-4
</label>
<label>
<input type="radio" name="field4" value="5"
onclick="getscores4(this)"/>
IC 35-38-9-5
</label>
</fieldset>
This is the JavaScript
function getscores1(score1) {
var getscores1 = (score1.value);
sendScores(getscores1);
}
function getscores2(score2) {
var getscores2 = (score2.value);
sendScores(getscores2);
}
function getscores3(score3) {
var getscores3 = (score3.value);
sendScores(getscores3);
}
function sendScores(getscores1, getscores2, getscores3){
var total = getscores1 + getscores2 + getscores3;
answer(total);
}
function answer(total) {
if (total == 3) {
document.getElementById('totalScore').innerHTML = "false";
} else{
document.getElementById('totalScore').innerHTML = "pass";
}
}

The variables your functions are defining are not global. Their values disappear after the function returns. So your sendScores function does not actually have access to those values unless you pass them as arguments. But while sendScores takes 3 arguments, you are only sending one (the one you have access too when you call the function).
One option would be to store these as global variables, but global variables are Generally Evil™. Alternatively, you can get all the values when you click submit. Here is a working example. Note this does not catch the case when the user does not respond to one or more of the questions. Click the "run snippet" button below to see it in action.
For your final question, you can put your js in a separate file and then put <script src="path/to/your/file/js"></script> in your html to load it.
function answer(total) {
var score = 0;
if (document.getElementById('exp_yes').checked) {
score++;
}
if (document.getElementById('chg_yes').checked) {
score++;
}
if (document.getElementById('sus_yes').checked) {
score++;
}
if (score > 0) {
document.getElementById('totalScore').innerHTML = "false";
} else {
document.getElementById('totalScore').innerHTML = "pass";
}
}
<fieldset class="article">
<legend>Have you had your record expunged before?</legend>
<input id=exp_yes type="radio" name="field1" value="0" />
<label>
Yes
</label>
<input id=exp_no type="radio" name="field1" value="1" />
<label>
No
</label>
</fieldset>
<fieldset class="article">
<legend>Do you have any charges pending against you?</legend>
<input id=chg_yes type="radio" name="field2" value="0" />
<label>
Yes
</label>
<input id=chg_no type="radio" name="field2" value="1" />
<label>
No
</label>
</fieldset>
<fieldset>
<legend>Is your drivers license suspended?</legend>
<input id=sus_yes type="radio" name="field3" value="0" />
<label>
Yes
</label>
<input id=sus_no type="radio" name="field3" value="1" />
<label>
No
</label>
</fieldset>
<fieldset id="submitbutton" class="article">
<input type="button" id="submit" value="submit" onclick='answer()' />
</fieldset>
</form>
<p id="totalScore">this is answer </p>

Show/Hide IDs with multiple radio buttons and IDs

So I have run into a little problem. I am making a Contact Form that changes according to the Users needs.
This is my html code. My goal is to First, Hide most of the Content with the first set of raio buttons. I actually managed to get that with this Javascript:
$(function() {
$('#report').on('click', function() {
if ($(this).is(':checked')) {
$('#phonenumber').hide();
$('#dateofplay').hide();
$('#customertype').hide();
$('#studentprices').hide();
$('#privateprices').hide();
$('#companyprices').hide();
$('#customsetup').hide();
} else {
$('#phonenumber').show();
$('#dateofplay').show();
$('#customertype').show();
$('#studentprices').show();
$('#privateprices').show();
$('#companyprices').show();
$('#customsetup').show();
}
})
$('#booking').on('click', function() {
if ($(this).is(':checked')) {
$('#phonenumber').show();
$('#dateofplay').show();
$('#customertype').show();
$('#studentprices').show();
$('#privateprices').show();
$('#companyprices').show();
$('#customsetup').show();
} else {
$('#phonenumber').hide();
$('#dateofplay').hide();
$('#customertype').hide();
$('#studentprices').hide();
$('#privateprices').hide();
$('#companyprices').hide();
$('#customsetup').hide();
}
})
$('#student').on('click', function() {
if ($(this).is(':checked')) {
$('#privateprices').hide();
$('#companyprices').hide();
} else {
$('#privateprices').show();
$('#companyprices').show();
}
})
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div role="main" class="ui-content" align="center">
<div class="ui-content-spacer">
<h3 class="ui-bar ui-bar-a ui-corner-all ui-content-spacer">
Booking Form
</h3>
<div class="ui-body ui-body-a ui-corner-all ui-content-spacer">
<form method="post" action="">
<div class="form-field-contain">
<fieldset data-role="controlgroup">
<legend>While the page is still under developement please define your inquiry: </legend>
<input type="radio" name="settings" id="report" value="report">
<label for="report">Bug Report</label>
<input type="radio" name="settings" id="booking" value="booking" checked="checked">
<label for="booking">Booking</label>
</fieldset>
</div>
<div class="form-field-contain ui-field-contain">
<label for="firstname">First Name:</label>
<input type="text" name="firstname" id="firstname" value="" placeholder="First Name...">
</div>
<div class="form-field-contain ui-field-contain">
<label for="lastname">Last Name:</label>
<input type="text" name="lastname" id="lastname" value="" placeholder="Last Name...">
</div>
<div class="form-field-contain ui-field-contain">
<label for="email">E-Mail</label>
<input type="email" name="email" id="email" value="" placeholder="E-Mail...">
</div>
<div class="form-field-contain ui-field-contain" id="phonenumber">
<label for="tel">Phone:</label>
<input type="tel" name="tel" id="tel" value="" placeholder="Phone #...">
</div>
<div class="form-field-contain ui-field-contain" id="dateofplay">
<label for="date">Date of event:</label>
<input type="date" name="date" id="date" value="" placeholder="Please choose a Date">
</div>
<div class="form-field-contain ui-field-contain">
<label for="message">Write a quick Message:</label>
<textarea cols="40" rows="8" name="message" id="message" placeholder="Your Message here..."></textarea>
</div>
<div class="form-field-contain" id="customertype">
<fieldset data-role="controlgroup">
<label><input type="radio" name="customertype" id="student" value="Student/Apprentice">Stundent/Apprentice</label>
<label><input type="radio" name="customertype" id="private" value="private" checked="checked">Private</label>
<label><input type="radio" name="customertype" id="company" value="company">Company</label>
</fieldset>
</div>
<div class="form-field-contain" id="studentprices">
<fieldset data-role="controlgroup">
<label><input type="radio" name="studentprice" id="studentminimal" value="studentminimal" checked="checked">Minimal</label>
<label><input type="radio" name="studentprice" id="studentsoundonly" value="studentsoundonly">Sound Only</label>
<label><input type="radio" name="studentprice" id="studentsoundandlight" value="studentsoundandlight">Sound and Light</label>
<label><input type="radio" name="studentprice" id="studentpartypackage" value="studentpartypackage">Total Party Package</label>
<label><input type="radio" name="studentprice" id="studentcustom" value="0">Custom</label>
</fieldset>
</div>
<div class="form-field-contain" id="privateprices">
<fieldset data-role="controlgroup">
<label><input type="radio" name="privateprice" id="minimal" value="150" checked="checked">Minimal</label>
<label><input type="radio" name="privateprice" id="soundonly" value="200">Sound Only</label>
<label><input type="radio" name="privateprice" id="soundandlight" value="300">Sound and Light</label>
<label><input type="radio" name="privateprice" id="partypackage" value="400">Total Party Package</label>
<label><input type="radio" name="privateprice" id="custom" value="0">Custom</label>
</fieldset>
</div>
<div class="form-field-contain" id="companyprices">
<fieldset data-role="controlgroup">
<label><input type="radio" name="companyprice" id="companyminimal" value="200" checked="checked">Minimal</label>
<label><input type="radio" name="companyprice" id="companysoundonly" value="300">Sound Only</label>
<label><input type="radio" name="companyprice" id="companysoundandlight" value="400">Sound and Light</label>
<label><input type="radio" name="companyprice" id="companypartypackage" value="500">Total Party Package</label>
<label><input type="radio" name="companyprice" id="companycustom" value="0">Custom</label>
</fieldset>
</div>
<div class="form-field-contain" id="customsetup">
<fieldset data-role="controlgroup" id="customsetup">
<legend>Custom choices:</legend>
<label><input type="checkbox" name="speakers" id="speakers" value="">Speakers</label>
<label><input type="checkbox" name="subwoofer" id="subwoofer" value="">Subwoofer</label>
<label><input type="checkbox" name="lighting" id="lighting" value="">Lighting</label>
<label><input type="checkbox" name="strobe" id="strobe" value="">Strobelight</label>
<label><input type="checkbox" name="fog" id="fog" value="">Fogmachine</label>
<label><input type="checkbox" name="table" id="table" value="">Table</label>
</fieldset>
</div>
<div class="form-field-contain">
<input type="submit" name="submit" value="Submit" data-inline="true">
<input type="reset" name="reset" value="Reset" data-inline="true">
</div>
</form>
</div>
</div>
</div>
I think the problem is that, because the first show/hide function is hiding/showing the ID's it overrides any following function. I can't wrap my head around how I can continue the code so the radio buttons that are not required are hidden.
So if,
#student is selected, #privateprices and #companyprices choices are hidden
#private is selected, #studentprices and #companyprices choices are hidden
#company is selected, #studentprices and #privateprices choices are hidden
Is it even possible or is there a easier more effective method of achieving this? Especially when I start creating the php for the form? Thanks in advance
EDIT: The last piece of code in the Javascript is my attempt hide the first set of radiobuttons.

You can check which radio button is selected in page loading and show / hide the panels. Please see working fiddle here:
https://jsfiddle.net/ranjitsachin/Leav016c/2/
$('#student').on('click', function() {
if ($(this).is(':checked')) {
$("#studentprices").show();
$('#privateprices, #companyprices').hide();
}
});
$('#private').on('click', function() {
if ($(this).is(':checked')) {
$("#privateprices").show();
$('#studentprices, #companyprices').hide();
}
});
$('#company').on('click', function() {
if ($(this).is(':checked')) {
$("#companyprices").show();
$('#studentprices, #privateprices').hide();
}
});

Here is a working pen on how I would do it. http://codepen.io/anon/pen/jBryOa
In this pen, i added the classes of report-group and booking-group to the respective divs, added a class of hide-group to the css with a setting of display: none; and then add and remove the class hide-group based on which radio button is checked. I also added the class hide-group in the html to the div's that need to be initially hidden.
I did not add the groups to every div. just enough to show you what you need to do.

nest radio button selection - javascript

I am working on my personal site and I am trying to nest my radio buttons.
I know I am supposed to have javascript running to do what I need it to do but I cant get a clear answer. What I am trying to do is as follows.
Options number 2 and 6 both have sub options to go with them. But I want that if i select 1 or 3-5 or 7 then the user cannot select any of the subs. and if the user selects a sub by mistake and tries to select one of the aforementioned numbers then it will clear the sub selection. please help. Or at lease can some one point me in the right direction? thanks so much.
<div class="one">
<div class="two">
<div class="three">
<div class="four">
<label class="five six">Section</label>
<div class="seven">
<label class="ten">
<input value="option_1" name="radios" type="radio" />
option 1</label>
</div>
<div class="seven">
<label class="ten">
<input value="option_2" name="radios" type="radio" />
option 2</label>
<br>
<div class="one">
<div class="one">
<div class="two">
<div class="three">
<div class="four">
<div class="eight">
<label class="nine">
<input type="radio" name="inline radio" value="sub_1">
Sub 1</label>
<label class="nine">
<input type="radio" name="inline radio" value="sub_2">
Sub 2</label>
<label class="nine">
<input type="radio" name="inline radio" value="sub_3">
Sub 3</label>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="seven">
<label class="ten">
<input value="option_3" name="radios" type="radio" />
option 3</label>
</div>
<div class="seven">
<label class="ten">
<input value="option_4" name="radios" type="radio" />
option 4</label>
</div>
<div class="seven">
<label class="ten">
<input value="option_5" name="radios" type="radio" />
option 5</label>
</div>
<div class="seven">
<label class="ten">
<input value="option_6" name="radios" type="radio" />
option 6</label>
<div class="one">
<div class="two">
<div class="three">
<div class="four">
<div class="eight">
<label class="nine">
<input type="radio" name="inline radio" value="sub_1">
Sub 1</label>
<label class="nine">
<input type="radio" name="inline radio" value="sub_2">
Sub 2</label>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="seven">
<label class="ten">
<input value="option_7" name="radios" type="radio" />
option 7</label>
</div>
</div>
</div>
</div>
</div>

Here's a little something using Jquery that might work if I understood your requirements correctly. The HTML is a dumbed down version of yours just to demonstrate the script.
<!doctype html>
<html>
<head>
<script src="//code.jquery.com/jquery-1.11.3.min.js"></script>
<script>
$(function(){
$("input[type=radio]").on("change",function(){
if($(this).hasClass("two") || $(this).hasClass("six") || $(this).hasClass("sub"))
$(".sub").removeAttr("disabled");
else
$(".sub").attr("checked",false).attr("disabled","disabled");
});
});
</script>
</head>
<body>
<form>
<input type=radio name="lvl1" class="one" value=""> Option 1<br>
<input type=radio name="lvl1" class="two" value=""> Option 2<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 1<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 2<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 3<br>
<input type=radio name="lvl1" class="three" value=""> Option 3<br>
<input type=radio name="lvl1" class="four" value=""> Option 4<br>
<input type=radio name="lvl1" class="five" value=""> Option 5<br>
<input type=radio name="lvl1" class="six" value=""> Option 6<br>
<input type=radio name="lvl3" class="sub six-sub" value=""> Sub 1<br>
<input type=radio name="lvl3" class="sub six-sub" value=""> Sub 2<br>
<input type=radio name="lvl1" class="seven" value=""> Option 7<br>
</form>
</body>
</html>
Here's the fiddle to check online: https://jsfiddle.net/bds87fjt/
The same solution as above using pure Javascript:-
<!doctype html>
<html>
<head>
<script>
function disableSub(){
sub = document.querySelectorAll(".sub");
for(i=0; i<sub.length; i++){
sub[i].checked=false;
sub[i].disabled=true;
}
}
function enableSub(){
sub = document.querySelectorAll(".sub");
for(i=0; i<sub.length; i++){
sub[i].disabled=false;
}
}
</script>
</head>
<body>
<form>
<input type=radio name="lvl1" onclick=disableSub(); class="one" value=""> Option 1<br>
<input type=radio name="lvl1" onclick=enableSub(); class="two" value=""> Option 2<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 1<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 2<br>
<input type=radio name="lvl2" class="sub two-sub" value=""> Sub 3<br>
<input type=radio name="lvl1" onclick=disableSub(); class="three" value=""> Option 3<br>
<input type=radio name="lvl1" onclick=disableSub(); class="four" value=""> Option 4<br>
<input type=radio name="lvl1" onclick=disableSub(); class="five" value=""> Option 5<br>
<input type=radio name="lvl1" onclick=enableSub(); class="six" value=""> Option 6<br>
<input type=radio name="lvl3" class="sub six-sub" value=""> Sub 1<br>
<input type=radio name="lvl3" class="sub six-sub" value=""> Sub 2<br>
<input type=radio name="lvl1" onclick=disableSub(); class="seven" value=""> Option 7<br>
</form>
</body>
</html>
Here's the fiddle for above: https://jsfiddle.net/0omtop0t/
And here's another neat little solution using just HTML and CSS: http://jsfiddle.net/NhXUV/
Not sure, it'll work in your case though. Worth checking out.

I'd definitely go with JavaScript for this one.
Basically, you could write a function that would be called whenever a radio button from a div of the class, lets call it gotNestedStuff, has his selection changed. The toggle will show/hide the div with the class nestedStuff that contains the sub-options that can only be selected if the main option is.
Here's the basic function (with jQuery):
<script type="text/javascript">
//let's hide the nested stuff on page load
$(document).ready(function() {
$('.nestedStuff').hide();
});
//on click on an element that has class "gotNestedStuff", show it's hidden content
$('.gotNestedStuff .option').on('change', function(e) {
console.log($(e.relatedTarget));
$(e.target).parent('.gotNestedStuff').children('.nestedStuff').toggle();
});
</script>
Working with this HTML for example :
<div>
<div class="optionContainer">
<input class="option" type="radio" name="option" value="1">Option 1
</div>
<div class="optionContainer gotNestedStuff">
<input class="option" type="radio" name="option" value="2">Option 2<br>
<div class="optionContainer nestedStuff">
<input class="option" type="radio" name="option" value="2.1">Option 2.1<br>
<input class="option" type="radio" name="option" value="2.2">Option 2.2<br>
</div>
</div>
<div class="optionContainer">
<input class="option" type="radio" name="option" value="3">Option 3<br>
<div>
</div>
You could also call a function "onclick" from your element that would validate if an item with nested stuff hidden is selected, that it should show it to the user.
Ex. <input type="radio" onclick="myfunction()" />