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How to use jQuery hide effect in select option

I got one more doubt I'm close to the answer but not getting it to worked. Actually I have the a default input text & default drop-down(drop-down which consist of west Bengal & others). Now if someone click's on the west Bengal state under drop-down then the default input should get hide and the west Bengal drop-down should get displayed.
Below is the code what I have tried. Can any one please guideme I'm a bit new to jQuery.
$(document).ready(function() {
$("#state").on("select", function() {
if ($(this).val() ===
"WestBengal") {
$(".otherdistricts").hide();
$(".westbengaldistrict").show();
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-sm-4">
<div class="form-group">
<select id="state" name="state" class="form-control" required="true" autocomplete="false" style="margin-bottom:10px">
<option value="" disabled="" selected="">Select State</option>
<option value="WestBengal">West Bengal</option>
<option value="Others">Others</option>
</select>
</div>
</div>
<div class="col-sm-4">
<div class="form-group
otherdistricts">
<input class="form-
control form-control-lg" type="text" name="other_district" id="other_district" placeholder="Enter Your District" autocomplete="false">
</div>
<div class="westbengaldistrict" style="display:none">
<select class="form-
control" name="district" id="district" autocomplete="false">
<option value="" selected disabled>Select Your District</option>
<option value="Alipurduar">Alipurduar</option>
<option value="Bankura">Bankura</option>
<option value="PaschimBardhaman">Paschim Bardhaman</option>
<option value="PurbaBardhaman">Purba Bardhaman</option>
<option value="Birbhum">Birbhum</option>
<option value="CoochBehar">Cooch Behar</option>
<option value="Darjeeling">Darjeeling</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="DakshinDinajpur">Dakshin Dinajpur</option>
<option value="Hooghly">Hooghly</option>
<option value="Howrah">Howrah</option>
<option value="Jalpaiguri">Jalpaiguri</option>
<option value="Jhargram">Jhargram</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="Kalimpong">Kalimpong</option>
<option value="Malda">Malda</option>
<option value="PaschimMedinipur">Paschim Medinipur</option>
<option value="PurbaMedinipur">Purba Medinipur</option>
<option value="Murshidabad">Murshidabad</option>
<option value="Nadia">Nadia</option>
<option value="North24Parganas">North 24 Parganas</option>
<option value="South24Parganas">South 24 Parganas</option>
<option value="Purulia">Purulia</option>
</select>
</div>
</div>

'select' is not the jQuery event you are expecting. It is related to text selectiongs in text inputs and text areas.
You should use 'change' instead for when the value of the select field changes.
$(document).ready(function() {
$("#state").on("change", function() {
if ($(this).val() ===
"WestBengal") {
$(".otherdistricts").hide();
$(".westbengaldistrict").show();
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-sm-4">
<div class="form-group">
<select id="state" name="state" class="form-control" required="true" autocomplete="false" style="margin-bottom:10px">
<option value="" disabled="" selected="">Select State</option>
<option value="WestBengal">West Bengal</option>
<option value="Others">Others</option>
</select>
</div>
</div>
<div class="col-sm-4">
<div class="form-group
otherdistricts">
<input class="form-
control form-control-lg" type="text" name="other_district" id="other_district" placeholder="Enter Your District" autocomplete="false">
</div>
<div class="westbengaldistrict" style="display:none">
<select class="form-
control" name="district" id="district" autocomplete="false">
<option value="" selected disabled>Select Your District</option>
<option value="Alipurduar">Alipurduar</option>
<option value="Bankura">Bankura</option>
<option value="PaschimBardhaman">Paschim Bardhaman</option>
<option value="PurbaBardhaman">Purba Bardhaman</option>
<option value="Birbhum">Birbhum</option>
<option value="CoochBehar">Cooch Behar</option>
<option value="Darjeeling">Darjeeling</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="DakshinDinajpur">Dakshin Dinajpur</option>
<option value="Hooghly">Hooghly</option>
<option value="Howrah">Howrah</option>
<option value="Jalpaiguri">Jalpaiguri</option>
<option value="Jhargram">Jhargram</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="Kalimpong">Kalimpong</option>
<option value="Malda">Malda</option>
<option value="PaschimMedinipur">Paschim Medinipur</option>
<option value="PurbaMedinipur">Purba Medinipur</option>
<option value="Murshidabad">Murshidabad</option>
<option value="Nadia">Nadia</option>
<option value="North24Parganas">North 24 Parganas</option>
<option value="South24Parganas">South 24 Parganas</option>
<option value="Purulia">Purulia</option>
</select>
</div>
</div>

$(document).ready(function() {
$(document).on("change","#state", function() {
if ($(this).val() ===
"WestBengal") {
$(".otherdistricts").hide();
$(".westbengaldistrict").show();
}else{
$(".westbengaldistrict").hide();
$(".otherdistricts").show();
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-sm-4">
<div class="form-group">
<select id="state" name="state" class="form-control" required="true" autocomplete="false" style="margin-bottom:10px">
<option value="" disabled="" selected="">Select State</option>
<option value="WestBengal">West Bengal</option>
<option value="Others">Others</option>
</select>
</div>
</div>
<div class="col-sm-4">
<div class="form-group
otherdistricts">
<input class="form-
control form-control-lg" type="text" name="other_district" id="other_district" placeholder="Enter Your District" autocomplete="false">
</div>
<div class="westbengaldistrict" style="display:none">
<select class="form-
control" name="district" id="district" autocomplete="false">
<option value="" selected disabled>Select Your District</option>
<option value="Alipurduar">Alipurduar</option>
<option value="Bankura">Bankura</option>
<option value="PaschimBardhaman">Paschim Bardhaman</option>
<option value="PurbaBardhaman">Purba Bardhaman</option>
<option value="Birbhum">Birbhum</option>
<option value="CoochBehar">Cooch Behar</option>
<option value="Darjeeling">Darjeeling</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="DakshinDinajpur">Dakshin Dinajpur</option>
<option value="Hooghly">Hooghly</option>
<option value="Howrah">Howrah</option>
<option value="Jalpaiguri">Jalpaiguri</option>
<option value="Jhargram">Jhargram</option>
<option value="UttarDinajpur">Uttar Dinajpur</option>
<option value="Kalimpong">Kalimpong</option>
<option value="Malda">Malda</option>
<option value="PaschimMedinipur">Paschim Medinipur</option>
<option value="PurbaMedinipur">Purba Medinipur</option>
<option value="Murshidabad">Murshidabad</option>
<option value="Nadia">Nadia</option>
<option value="North24Parganas">North 24 Parganas</option>
<option value="South24Parganas">South 24 Parganas</option>
<option value="Purulia">Purulia</option>
</select>
</div>
</div>

HTML form with JS does not work properly in PHP

I have a form with JS where I hide and show form's fields after choosing option with radiobuttons.
<?php require_once 'resources/menus/adminMenu.php'; ?>
<div class="col-lg-offset-3 col-lg-6 ">
<div class="well bs-component">
<form class="form-group" method="post">
<fieldset>
<legend>Wyszukaj</legend>
<div class="form-group" style="display: block" id="queryIndex">
<label for="index" class="control-label">Indeks</label>
<input class="form-control" id="index" name="index" type="text">
</div>
<div class="form-group" style="display: none" id="queryName">
<label for="name" class="control-label">Imię</label>
<input class="form-control" id="name" name="name" type="text">
<label for="surname" class="control-label">Nazwisko</label>
<input class="form-control" id="surname" name="surname" type="text">
</div>
<div class="form-group" style="display: none" id="queryFaculty">
<label for="faculty" class="control-label">Wydział</label>
<select class="form-control" id="faculty" name="faculty" required="required">
<option value=""></option>
<option value="Wydział A">Wydział A</option>
<option value="Wydział B">Wydział B</option>
<option value="Wydział C">Wydział C</option>
<option value="Wydział D">Wydział D</option>
<option value="Wydział E">Wydział E</option>
</select>
</div>
<div class="form-group" style="display: none" id="querySubject">
<label for="subject" class="control-label">Kierunek</label>
<select class="form-control" id="subject" name="subject" required="required">
<option value=""></option>
<option value="Kierunek AA">Kierunek AA</option>
<option value="Kierunek AB">Kierunek AB</option>
<option value="Kierunek AC">Kierunek AC</option>
<option value="Kierunek BA">Kierunek BA</option>
<option value="Kierunek BB">Kierunek BB</option>
<option value="Kierunek BC">Kierunek BC</option>
<option value="Kierunek CA">Kierunek CA</option>
<option value="Kierunek CB">Kierunek CB</option>
<option value="Kierunek CC">Kierunek CC</option>
<option value="Kierunek DA">Kierunek DA</option>
<option value="Kierunek DB">Kierunek DB</option>
<option value="Kierunek DC">Kierunek DC</option>
<option value="Kierunek EA">Kierunek EA</option>
<option value="Kierunek EB">Kierunek EB</option>
<option value="Kierunek EC">Kierunek EC</option>
</select>
</div>
<div class="form-group" style="display: none" id="querySystem">
<label for="system" class="control-label">System</label>
<select class="form-control" id="system" name="system" required="required">
<option value=""></option>
<option value="st">Stacjonarne</option>
<option value="nst">Niestacjonarne</option>
</select>
</div>
<div class="form-group" style="display: none" id="queryDegree">
<label for="degree" class="control-label">Stopień</label>
<select class="form-control" id="degree" name="degree" required="required">
<option value=""></option>
<option value="I">1. stopień (inżynierskie/licencjat)</option>
<option value="II">2. stopień (magisterskie)</option>
</select>
</div>
<div class="form-group" style="display: none" id="querySemester">
<label for="semester" class="control-label">Semestr</label>
<select class="form-control" id="semester" name="semester" required="required">
<option value=""></option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
</select>
</div>
<div class="form-group">
<input type="radio" name="search" value="index" checked="checked"
onClick="changeForm('queryIndex')"> Indeks
<input type="radio" name="search" value="name"
onClick="changeForm('queryName')"> Imię i nazwisko
<input type="radio" name="search" value="faculty"
onClick="changeForm('queryFaculty')"> Wydział
<input type="radio" name="search" value="subject"
onClick="changeForm('querySubject')"> Kierunek
<input type="radio" name="search" value="system"
onClick="changeForm('querySystem')"> System
<input type="radio" name="search" value="degree"
onClick="changeForm('queryDegree')"> Stopień
<input type="radio" name="search" value="semester"
onClick="changeForm('querySemester')"> Semestr
</div>
<script type="text/javascript">
function changeForm(element) {
document.getElementById('queryIndex').style.display = 'none';
document.getElementById('queryName').style.display = 'none';
document.getElementById('queryFaculty').style.display = 'none';
document.getElementById('querySubject').style.display = 'none';
document.getElementById('querySystem').style.display = 'none';
document.getElementById('queryDegree').style.display = 'none';
document.getElementById('querySemester').style.display = 'none';
document.getElementById(element).style.display = 'block';
}
</script>
<div class="form-group col-lg-4">
<div class="control-label">
<button type="submit" class="btn btn-primary" name="submit" value="searchStudent">Szukaj
</button>
</div>
</div>
</fieldset>
</form>
</div>
</div>
Also I have PHP file, where I get data from this form.
function studentWindow()
{
$this->setView("AdminPanel", "StudentWindow");
if (isset($_POST['submit']) && $_POST['submit'] == 'searchStudent') {
$query="";
$data=array();
if($_POST['search']=='index'){
$data['index']=sanitizeString($_POST['index']);
$query="st_index LIKE '?%'";
}
elseif($_POST['search']=='name'){
$data['name']=sanitizeString($_POST['name']);
$data['surname']=sanitizeString($_POST['surname']);
$query="name LIKE '?%' AND surname LIKE '?%'";
}
elseif($_POST['search']=='faculty'){
$data['faculty']=$_POST['faculty'];
$query='AS st INNER JOIN subject AS s ON st.id_subject=s.id_subject INNER JOIN faculty AS f ON s.id_faculty=f.id_faculty WHERE f.name=?';
}
elseif($_POST['search']=='subject'){
$data['subject']=$_POST['subject'];
$query='AS st INNER JOIN subject AS s ON st.id_subject=s.id_subject WHERE s.name=?';
}
elseif($_POST['search']=='system'){
$data['system']=$_POST['system'];
$query='system=?';
}
elseif($_POST['search']=='degree'){
$data['degree']=$_POST['degree'];
$query='degree=?';
}
elseif($_POST['search']=='semester'){
$data['semester']=$_POST['semester'];
$query='semester=?';
}
$this->loadModel("AdminPanel");
$model = new AdminPanelModel();
$model->getStudents($query,$data);
}
}
This is a problem. I can't get data from forms and also the button doesn't work. I made other forms like this but without JS. This may be the cause. Do you have any suggestions or solutions?
P.S. Sorry for my English ;)

The problem is using required='required' when the form fields are not required.
The user can submit at any time and it is not evident that you must click each radio button in turn to fill out that portion, if that was the intention.
I ran your code as plain HTML and examined the POST data in the Chrome Dev Tools and it works fine if you fill out all fields with required...
You will get an error in console that says the following:
An invalid form control with name='faculty' is not focusable.
Chrome is trying to focus the field to add error messages, but you set style.display = 'none' so it can't.

Change Form action url Dynamically

So I need to change the default url to something much better I have made it to work on .htaccess but I can't do it into the form action...Can someone tell me how to change the form url the form goes to the url
s=thesearch&for=for&genre=genre&lang=lang&quality=quality&rating=rating&orderby=orderby
I want to make the form goes to
s=thesearch/for/genre/lang/quality/rating/orderby
the form code that goes into the first url:
<form role="search" method="get" class="search-form" action="s=">
<label>
<input autofocus autocomplete="off" type="search" class="search-field" placeholder="Search …" value="" name="" title="Search for:">
</label>
<input type="submit" class="search-submit" value="Search">
<!-- Squared THREE -->
<div class="squaredThree">
<input type="checkbox" id="squaredThree" name="check" />
<label for="squaredThree">
<div style="font-weight: 700;font-size: 1.1em;color: #5a5a5a;margin-left:25px;margin-top:2px;">Advanced</div>
<div style="font-weight: 700;font-size: 1.1em;color: #5a5a5a;margin-left:98px;margin-top:-20px;">Search</div></label>
</div>
<script type="text/javascript">
document.getElementById('squaredThree').onchange = function() {
document.getElementById('advanced-search').style.display = this.checked ? 'block' : 'none';
};
</script>
<div id="advanced-search">
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:70px;">
Search For:
</span>
<select name="for" style="margin-left:46px;">
<option value="Title" selected="selected">Title</option>
<option value="Actor">Actor</option>
<option value="Writer">Writer</option>
<option value="Director">Director</option>
<option value="Company">Company</option>
<option value="IMDb_ID">IMDb ID</option>
</select><br>
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:85px;">
Genre:
</span>
<select name="genre" style="margin-left:46px;">
<option value="All" selected="selected">All</option>
<option value="Action">Action</option>
<option value="Adventure">Adventure</option>
<option value="Animation">Animation</option>
<option value="Comedy">Comedy</option>
<option value="Crime">Crime</option>
<option value="Drama">Drama</option>
<option value="Family">Family</option>
<option value="Fantasy">Fantasy</option>
<option value="Horror">Horror</option>
<option value="Music">Music</option>
<option value="Musical">Musical</option>
<option value="Mystery">Mystery</option>
<option value="Romance">Romance</option>
<option value="Sci-Fi">Sci-Fi</option>
<option value="Sport">Sport</option>
<option value="Thriller">Thriller</option>
<option value="War">War</option>
<option value="Western">Western</option></select>
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:82px;">Subtitle:</span>
<select name="lang" style="margin-left:46px;">
<option value="All" selected="selected">All</option>
<option value="Arabic">Arabic</option>
<option value="Czech">Czech</option>
<option value="Danish">Danish</option>
<option value="Dutch">Dutch</option>
<option value="English">English</option>
<option value="French">French</option>
<option value="German">German</option>
<option value="Greek">Greek</option>
<option value="Indonesian">Indonesian</option>
<option value="Malay">Malay</option>
<option value="Spanish">Spanish</option>
<option value="Swedish">Swedish</option>
<option value="Turkish">Turkish</option>
</select>
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:82.5px;">Quality:</span>
<select name="quality" style="margin-left:46px;">
<option value="All" selected="selected">All</option>
<option value="CAM">CAM</option>
<option value="Non-HD">Non HD</option>
<option value="HD">HD</option>
<option value="Full-HD">Full HD</option></select>
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:85px;">Rating:</span>
<select name="rating" style="margin-left:46px;">
<option value="0" selected="selected">All</option>
<option value="9">9+</option>
<option value="8">8+</option>
<option value="7">7+</option>
<option value="6">6+</option>
<option value="5">5+</option>
<option value="4">4+</option>
<option value="3">3+</option>
<option value="2">2+</option>
<option value="1">1+</option>
</select><br>
<span style="font-weight: 700;font-size: 1.2em;color: #5a5a5a;margin-left:76px;">Order By:</span>
<select name="orderby" style="margin-left:46px;">
<option value="Latest" selected="selected">Latest</option>
<option value="Oldest">Oldest</option>
<option value="Rating">Rating</option>
<option value="Alphabetical">Alphabetical</option>
<option value="Views">Views</option></select>
</select>
</div>
</form>
Anyone who knows how to change the form url with something...

You can set you action attribute like any other attribute
$("form").attr("action", "/path/to/formaction");

bootstrap pull-right class and row class

I have the following html
<form action="/customer/images/1/upload_xray" method="post" id="xrayform" enctype="multipart/form-data">
<input id="id_form-TOTAL_FORMS" name="form-TOTAL_FORMS" type="hidden" value="2">
<input id="id_form-INITIAL_FORMS" name="form-INITIAL_FORMS" type="hidden" value="0">
<input id="id_form-MAX_NUM_FORMS" name="form-MAX_NUM_FORMS" type="hidden" value="1000">
<input type="hidden" name="csrfmiddlewaretoken" value="LI1L39J1C7P4tQeqfJhL5CBuW283FmOI">
<div class="form-group">
<label for="date">Date</label>
<input id="date" type="text" name="date" class="form-control input-sm datepicker input-append date" readonly="">
</div>
<div class="form-group">
<label for="id_title">Title</label>
<select class="form-control input-sm" id="id_title" name="title">
<option value="" selected="selected">---------</option>
<option value="Observation">Observation</option>
<option value="Initial">Initial</option>
<option value="Progress">Progress</option>
<option value="Final">Final</option>
<option value="Post Treatment">Post Treatment</option>
</select>
</div>
<hr class="divider">
<div class="form-wrapper">
<div class="form-group">
<label for="id_form-0-image">Image</label>
<input id="id_form-0-image" name="form-0-image" type="file">
</div>
<div class="form-group">
<label for="id_form-0-type">Type</label>
<select class="form-control input-sm" id="id_form-0-type" name="type">
<option value="" selected="selected">---------</option>
<option value="xray">X-ray Image</option>
<option value="internal">Intraoral Image</option>
<option value="external">Extra-oral Image</option>
<option value="model">Model</option>
</select>
</div>
<div class="form-group">
<label for="id_form-0-desc">Desc</label>
<select class="form-control input-sm" id="id_form-0-desc" name="form-0-desc">
<option value="" selected="selected">---------</option>
<optgroup label="Xray">
<option value="PA Ceph">PA Ceph</option>
<option value="Lateral Ceph">Lateral Ceph</option>
<option value="Panoramic">Panoramic</option>
</optgroup><optgroup label="Interior oral">
<option value="Anterior Occlution">Anterior Occlution</option>
<option value="Anterior Occlusion Relaxed">Anterior Occlusion Relaxed</option>
<option value="Overjet Right">Overjet Right</option>
<option value="Overjet Left">Overjet Left</option>
<option value="Right Occlusion">Right Occlusion</option>
<option value="Left Occlusion">Left Occlusion</option>
<option value="Upper Occlusal">Upper Occlusal</option>
<option value="Lower Occlusal">Lower Occlusal</option>
<optgroup label="External oral">
<option value="Frontal">Frontal</option>
<option value="Lateral Right">Lateral Right</option>
<option value="Lateral Left">Lateral Left</option>
<option value="Oblique smile Right">Oblique smile Right</option>
<option value="Oblique smile Left">Oblique smile Left</option>
<option value="Frontal smile">Frontal smile</option>
<option value="Oblique Right">Oblique Right</option>
<option value="Oblique Left">Oblique Left</option>
<optgroup label="Model">
<option value="Model Upper Occlusal">Model Upper Occlusal</option>
<option value="Model Lower Occlusal">Model Lower Occlusal</option>
<option value="Model Right Buccal">Model Right Buccal</option>
<option value="Model Left Buccal">Model Left Buccal</option>
<option value="Model Anterior Dental">Model Anterior Dental</option>
</select>
</div>
</div>
<div class="form-wrapper">
<div class="form-group">
<label for="id_form-2-image">Image</label>
<input id="id_form-2-image" name="form-2-image" type="file">
</div>
<div class="form-group">
<label for="id_form-2-type">Type</label>
<select class="form-control input-sm" id="id_form-2-type" name="form=2-type">
<option value="" selected="selected">---------</option>
<option value="xray">X-ray Image</option>\
<option value="internal">Intraoral Image</option>
<option value="external">Extra-oral Image</option>
<option value="model">Model</option>
</select>
</div>
<div class="form-group">
<label for="id_form-2-desc">Desc</label>
<select class="form-control input-sm" id="id_form-2-desc" name="form-2-desc">
<option value="" selected="selected">---------</option>
<optgroup label="Xray">
<option value="PA Ceph">PA Ceph</option>
<option value="Lateral Ceph">Lateral Ceph</option>
<option value="Panoramic">Panoramic</option>
<optgroup label="Interior oral">
<option value="Anterior Occlution">Anterior Occlution</option>
<option value="Anterior Occlusion Relaxed">Anterior Occlusion Relaxed</option>
<option value="Overjet Right">Overjet Right</option>
<option value="Overjet Left">Overjet Left</option>
<option value="Right Occlusion">Right Occlusion</option>
<option value="Left Occlusion">Left Occlusion</option>
<option value="Upper Occlusal">Upper Occlusal</option>
<option value="Lower Occlusal">Lower Occlusal</option>
<optgroup label="External oral">
<option value="Frontal">Frontal</option>
<option value="Lateral Right">Lateral Right</option>
<option value="Lateral Left">Lateral Left</option>
<option value="Oblique smile Right">Oblique smile Right</option>
<option value="Oblique smile Left">Oblique smile Left</option>
<option value="Frontal smile">Frontal smile</option>
<option value="Oblique Right">Oblique Right</option>
<option value="Oblique Left">Oblique Left</option>
<optgroup label="Model">
<option value="Model Upper Occlusal">Model Upper Occlusal</option>
<option value="Model Lower Occlusal">Model Lower Occlusal</option>
<option value="Model Right Buccal">Model Right Buccal</option>
<option value="Model Left Buccal">Model Left Buccal</option>
<option value="Model Anterior Dental">Model Anterior Dental</option>
</select>
</div>
<button class="btn btn-danger btn-sm pull-right" id="2">-</button>
</div>
</form>
<div class="row">
<button class="btn btn-success btn-sm pull-right">+</button>
</div>
The + button adds another one of div.form-wrapper elements with the new form fields dynamically using javascript. It also generates the - button to remove the form dynamically. The problem is that - and + because they both are pulled right they appear on the same row. Which I don't want that. doesn't row class in bootstrap clear both? Here is a bootply example of the above

you could add another row element to the - button
<div class="row">
<button class="btn btn-danger btn-sm pull-right" id="2">-</button>
</div>

You can use
<div class="clearfix" /> after your pull-right elements. That should do it.

In following bootstrap syntax : You need to have a col in a row.
It's not your case for the + button :
Add a col-xs-12 div :
<div class="row">
<div class="col-xs-12">
<button class="btn btn-success btn-sm pull-right">+</button>
</div>
</div>
Bootply : http://www.bootply.com/116837

making select-boxes required if appropriate radio button selected

I wanted to make my 2 select boxes required if they select the radio button foreign language so they can make the choices of what language they want and at which level was not sure exactly how to accomplish this
<label for"artlang"=""> Fine Arts or Language: </label><br>
<input name="ArtLang" type="radio" value="Art150" required>Art 150<br>
<input name="ArtLang" type="radio" value="Mus150"required>Music 150 <br>
<input name="ArtLang" type="radio" value="Lang"required>Foreign Language
<label for="language">Language: </label>
<select name="language">
<option name"="" "="" value=" "> </option>
<option name="chinese" value="chinese">Chinese</option>
<option name="french" value="french">French</option>
<option name="german" value="german">German</option>
<option name="greek" value="greek">Greek</option>
<option name="italian" value="italian">Italian</option>
<option name="japanese" value="japanese">Japanese</option>
<option name="latin" value="latin">Latin</option>
<option name="russian" value="russian">Russian</option>
<option name="spanish" value="spanish">Spanish</option>
</select>
<label for="languagelevel">Level: </label>
<select name="languagelevel">
<option name"="" "="" value=" "> </option>
<option name="Elementary" value="elementary">Elementary</option>
<option name="intermediate" value="intermediate">Intermediate</option>
<option name="advanced" value="advanced">Advanced</option>
</select>