I have two dropdowns. I want the second dropdown, Assign value to be set to null when the specific value which is student from the first dropdown is chosen.
First dropdown:
<select name="Reg">
<option value="">Choose</option>
<option value="admin">Admin</option>
<option value="student">Student</option>
</select>
This is the second dropdown which is hidden, shown only when Reg with value admin is chosen.
<select name="Assign">
<option value="">Choose</option>
<?php
$sql=odbc_exec($conn,'SELECT AssignCd, AssignNm FROM AssignList');
if(odbc_fetch_row($sql))
{
$AssignCd= odbc_result($sql, "AssignCd");
$AssignNm= odbc_result($sql, "AssignNm");
echo "<option value='".$AssignCd."'>".$AssignNm."</option>";
}
?>
</select>
I tried by doing the following but it doesn't work.
Please Help.
if($("#Reg").val("student");) {
$("#AssignCd").val("");
$("#AssignNm").val("");
}
UPDATED:
When Admin is selected, Assign with admin is chosen will be automatically selected. The problem is when I change my option to Student, the supposed value student is chosen is not shown.
How can I make the Assign value of both Admin and Student stay as it is and not jumbled up between them?
This is my code :
fiddle
$(document).ready(function() {
$("#Reg").on("change", function() {
if ($(this).find("option:selected").text() === 'Admin') {
$("#Assign").show();
$('select[name="Assign"] option[name="student_assign"]').attr("disabled",true).prop("selected", false).wrap('<span>');
$('select[name="Assign"] option[name="admin_assign"]').prop('selected',true);
}
else if ($(this).find("option:selected").text() === 'Student') {
$("#Assign").show();
$('select[name="Assign"] option[name="student_assign"]').prop('selected',true);
} else {
$("#Assign").hide().attr("disabled"," ");
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<select name="Reg" id="Reg">
<option value="">Choose</option>
<option value="admin">Admin</option>
<option value="student">Student</option>
</select>
<select name="Assign" id="Assign">
<option value=" ">Choose</option>
<option name ="student_assign" value="student_assign">student is chosen</option>
<option name ="admin_assign" value="admin_assign">admin is chosen</option>
</select>
$('select[name="Reg"]').on('change', function() {}) this will trigger when you select an option in your select
$(this).find("option:selected").val() == "student" this will see if you have select an option with value "student"
$('select[name="Assign"] option[value="AssignCd"]').text(""); this sets the text of the option with value = AssignCd to empty
This is how far we can go without showing us your generated html for <select name="Assign">
$('select[name="Reg"]').on('change', function() {
if ($(this).find("option:selected").val() == "student") {
$('select[name="Assign"] option[value="AssignCd"]').text("");
}
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="Reg">
<option value="">Choose</option>
<option value="admin">Admin</option>
<option value="student">Student</option>
</select>
<select name="Assign">
<option value="AssignCd">AssignNm</option>
</select>
Update
There is no need to use .wrap() as far as i can see, use .hide() / .show() look at the example below.
$(document).ready(function() {
$("#Reg").on("change", function() {
if ($(this).find("option:selected").text() === 'Admin') {
$("#Assign").show();
$('select[name="Assign"] option[name="student_assign"]').attr("disabled", true).prop("selected", false).hide();
$('select[name="Assign"] option[name="admin_assign"]').prop('selected', true);
} else if ($(this).find("option:selected").text() === 'Student') {
$('select[name="Assign"] option[name="student_assign"]').attr("disabled", false).prop("selected", true).show()
$('select[name="Assign"] option[name="student_assign"]').prop('selected', true);
} else {
$("#Assign").hide().attr("disabled", " ");
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<select name="Reg" id="Reg">
<option value="">Choose</option>
<option value="admin">Admin</option>
<option value="student">Student</option>
</select>
<select name="Assign" id="Assign">
<option value=" ">Choose</option>
<option name ="student_assign" value="student_assign">student is chosen</option>
<option name ="admin_assign" value="admin_assign">admin is chosen</option>
</select>
<select name="Reg" id="Reg">
<option value="">Choose</option>
<option value="admin">Admin</option>
<option value="student">Student</option>
</select>
First of all #<selector> is used to select Dom elements which have an id <selector>. You cannot access them with the name attribute and id selector.
As for your issue. you need to use the on change event of the first drop down to decide the visibility of the second drop down.
<select name="Assign" id="Assign">
<option value="">Choose</option>
....
....
$('#Assign').hide(); // first hide it so they cannot see it
$(document).on('change', '#Reg', function(e){
if($(this).val()=='admin'){
$('#Assign').show();
}else{
$('#Assign').val('').hide();
}
})
Related
Is it possible to hide options in a select/dropdown with jQuery based on the user's selection from a previous dropdown e.g:
If user is 8 (Age Select/Dropdown), and chooses subject English (Subject Select/Dropdown) then hide Location 2 from (Locations dropdown)?
<select name="age">
<option value="8">8</div>
<option value="9">9</div>
<option value="10">10</div>
<option value="11">11</div>
</select>
<select name="subject">
<option value="eng">English</div>
<option value="maths">Maths</div>
<option value="science">Science</div>
</select>
<select name="subject">
<option value="loc-1">Location One</div>
<option value="loc-2">Location Two</div>
<option value="loc-3">Location Three</div>
</select>
Thank you!
you just need to add change function to your drop-down and according to your requirement you need to add your logic. see below example.
$(document).ready(function(){
$("#age").change(function(){
hideOption();
})
$("#subject").change(function(){
hideOption();
})
})
function hideOption(){
var age=$("#age").val();
var subject=$("#subject").val();
if(age==8 && subject=="Maths"){
$("#location [value='Location Two']").hide();
}
else{
$("#location [value='Location Two']").show();
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="age" id='age'>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
</select>
<select name="subject" id='subject'>
<option value="English">English</option>
<option value="Maths">Maths</option>
<option value="Science">Science</option>
</select>
<select name="Location" id='location'>
<option value="Location One">Location One</option>
<option value="Location Two">Location Two</option>
<option value="Location Three">Location Three</option>
</select>
You can do something like below
$(document).on('change', '.age', function(e){
var val = $(this).val();
var subject = $('.subject').find(":selected").val();
if(val == 8 && subject == 'English' ){
$('.location option[value="Two"]').hide();
} else {
$('.location option[value="Two"]').show();
}
})
$(document).on('change', '.subject', function(e){
var age = $('.age').find(":selected").val();
var val = $(this).val();
if(age == 8 && val == 'English' ){
$('.location option[value="Two"]').hide();
} else {
$('.location option[value="Two"]').show();
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select name="age" class="age">
<option >select</8>
<option value="8">8</8>
<option value="9">9</8>
<option value="10">10</8>
<option value="11">11</8>
</select>
<select name="subject" class="subject">
<option value="English">English</8>
<option value="Maths">Maths</8>
<option value="Science">Science</8>
</select>
<select name="location" class="location">
<option value="One">Location One</8>
<option value="Two">Location Two</8>
<option value="Three">Location Three</8>
</select>
With jQuery you can use .hide() and .show() to toggle element visibility. First however, you can check if the value of a select (for example age) was changed. Based on the logic you want to have, you can for example check what the value of the change was and do something if it matches a condition.
For example:
$( "#age-select" ).change(function() {
var value = $(this).val();
if(value == 8) {
$("#location-two").hide();
} else {
$("#location-two").show();
}
});
However, notice that I added an id for the "Location Two" option ("location-two") and for the age select element. Also, to make this work properly, you have to fix the values so that they're not all 8 and fix the closing tags of the elements (not ).
I need your help. So what I want to do is when a user select an option from one select, automatically hide an option from another multiple select.
Example:
if a user choose Car from select A, I want the car option from the select B to be automatically removed or hidden.
select A:
<select name="my_option_one" required id="id_my_option_one">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
Select B:
<select name="my_option_two" id="id_my_option_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
This is what I have tried but none of it worked.
$(document).ready(function() {
$("#id_my_option_one").change(function() {
if ($(this).val() === 'C') {
$("#id_my_option_two option[value='C']").options[0].remove();
$('select[name=my_option_two] option:eq(1)').hide();
$("#id_my_option_two option[value=" + 'C' + "]").hide();
$("#id_my_option_two option[value='C']").attr('disabled','disabled').hide();
}
});
});
function my_optionsChange() {
$("#id_my_options_two option").show(); //.css("display", "block");
$("#id_my_options_two option[value='" + $("#id_my_options").val() + "']").hide();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<select name="my_options" required id="id_my_options" onchange="my_optionsChange()">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
I made an example which is longer because it's split into parts so you understand better what is going on.
I tried to name the variables so that it's clear what they are, but if you have any questions, please ask in the comments.
Let me know if this works for you.
const firstSelect = $('#id_my_options')
const secondSelect = $('#id_my_options_two')
firstSelect.on('change',function() {
const selected = $(this).find('option:selected');
const selectedValue = selected.val()
const secondOptions = secondSelect.children();
secondOptions.each(function() {
const secondValue = $(this).val()
secondValue === selectedValue ? $(this).hide() : $(this).show()
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="my_options" required id="id_my_options">
<option value="Choose" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options" id="firstblock" onchange="disable(2,this.value);">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options" id="secondblock" onchange="disable(1,this.value);">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<script>
function disable(needtoblock,val){
console.log(needtoblock+" "+val);
if(val != ""){
if(needtoblock == 1){
$("#firstblock option[value='"+val+"']").prop('disabled', true);
}else if(needtoblock == 2){
$("#secondblock option[value='"+val+"']").prop('disabled', true);
}else{
}
}else{
$("#secondblock option").prop('disabled', false);
$("#firstblock option").prop('disabled', false);
}
}
</script>
This is how code could look, definetly you need to update and make it suitable for you.
I know, this is a bit late, but maybe it is of interest to someone out there. I understood the demand of OP so, that the hiding of options was to be done in any direction, or potentially spanning over multiple selector boxes. The following script will do exactly that: if you select an option in one selector it will go through the other selectors of the defined group $grp (by doing $grp.not(this).each((i,trg)=> ...)) and will hide/show all options there, depending of whether thay have been selected elsewhere already.
The $(to).toggle(...) method sets the visibility of each option (to) within trg, based on the existence of selected options with the same value in the sibling selectors of trg (again, limited to the current group $grp).
Maybe the script is a little too condensed for easy reading but it shows how much you can achieve with very little code when you use the power of jQuery.
const $grp=$('select[id^=id_my_options]') // define the selector group
$grp.on('change',function(ev){ // bind the change event ...
$grp.not(this).each((i,trg)=> // work on each sibling-selector (trg) of clicked
// selector (this), but only within jquery
// selection $grp
$('option[value!=""]',trg).each((j,to)=> // for all options of sibling-selectors of
// trg (within jquery selection $grp):
$(to).toggle($grp.not(trg).find('option[value='+to.value+']:selected').length==0))
// toggle the visibiltiy of that option
)
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="my_options" required id="id_my_options">
<option value="" selected>Choose..</option>
<option value="C">Car</option>
<option value="H">House</option>
<option value="A">Airplane</option>
</select>
<select name="my_options_two" id="id_my_options_two" multiple="multiple">
<option value="C">Car2</option>
<option value="H">House2</option>
<option value="A">Airplane2</option>
</select>
<select name="my_options_three" id="id_my_options_three" multiple="multiple">
<option value="O">yet another option</option>
<option value="C">Car3</option>
<option value="H">House3</option>
<option value="A">Airplane3</option>
</select>
<br><br>
<select name="my_options_four" id="id_your_options_four" multiple="multiple">
<option value="O">and some unrelated options</option>
<option value="C">Car3</option>
<option value="H">House3</option>
<option value="A">Airplane3</option>
</select>
I want to get a value from few dropdown, this few dropdown have a same name in
a table of database.And user can see only one dropdown base on their previous selection, but I can't detect which dropdown is selected by users.So I make something bellow:
$dropvalue = "GetFromJavaascriptBellow" //use to get value from javascript bellow
<select id="dropdown1" name="dropdown1">
<option selected disabled>-- Please select a option --</option>
<option value="abc">abc</option>
<option value="def">def</option>
<option value="ghi">ghi</option>
</select>
<select id="dropdown2" name="dropdown2">
<option selected disabled>-- Please select a option --</option>
<option value="123">123</option>
<option value="456">456</option>
<option value="789">789</option>
</select>
<select id="dropdown3" name="dropdown3">
<option selected disabled>-- Please select a option --</option>
<option value="aaa">aaa</option>
<option value="bbb">bbb</option>
<option value="ccc">ccc</option>
</select>
<script>
$('#dropdown1').change(function () {
if ( this.value != '' || this.value != NULL)
{
$dropvalue = this.value //This line is what I can't do (is it possible php variable get value from javascript?)
}
else
{
}
});
$('#dropdown2').change(function () {
if ( this.value != '' || this.value != NULL)
{
$dropvalue = this.value //This line is what I can't do (is it possible php variable get value from javascript?)
}
else
{
}
});
$('#dropdown3').change(function () {
if ( this.value != '' || this.value != NULL)
{
$dropvalue = this.value //This line is what I can't do (is it possible php variable get value from javascript?)
}
else
{
}
});
</script>
My current solution is using ajax to get all of the value from all drop down, and set the default value ='0' to all dropdown, in ajax using if else statement to check which dropdown is not equal to 0 to confirm what is my value and which dropdown is.But this way is conflict with my another function, so I finding another way to did it
Try this. Use querySelectorAll
x=document.querySelectorAll("select.abc");
for(i=0;i<x.length;i++){
x[i].addEventListener("change",function(){
console.log(this.value); // your ajax call or whatever function you want excute
});
}
<select id="dropdown1" name="dropdown1" class="abc">
<option selected disabled>-- Please select a option --</option>
<option value="abc">abc</option>
<option value="def">def</option>
<option value="ghi">ghi</option>
</select>
<select id="dropdown2" name="dropdown2" class="abc">
<option selected disabled>-- Please select a option --</option>
<option value="123">123</option>
<option value="456">456</option>
<option value="789">789</option>
</select>
<select id="dropdown3" name="dropdown3">
<option selected disabled>-- Please select a option --</option>
<option value="aaa">aaa</option>
<option value="bbb">bbb</option>
<option value="ccc">ccc</option>
</select>
I have 2 drop down list
<select id="servergroup" multiple="multiple">
<option value="P1">P1</option>
<option value="P2">P2</option>
<option value="P3">P3</option>
<option value="P4">P4</option>
</select>
<select id="servername" multiple="multiple">
<option value="s597ap233">s597ap233</option>
<option value="s597dp392">s597dp392</option>
<option value="s397dp095">s397dp095</option>
</select>
I want that the second drop down list should get enabled only if we choose a value in the first drop down list. It should again get disabled if we deselect the value from the first drop down list.
May I know how can this be achieved using jQuery?
You can use the disabled attribute and using JavaScript, you can set it as false or true
function check(){
if(document.getElementById('servergroup').value!='')
document.getElementById('servername').disabled=false;
else
document.getElementById('servername').disabled=true;
}
<select onchange="check()" id="servergroup" multiple="multiple">
<option value="P1">P1</option>
<option value="P2">P2</option>
<option value="P3">P3</option>
<option value="P4">P4</option>
</select>
<select disabled id="servername" multiple="multiple">
<option value="s597ap233">s597ap233</option>
<option value="s597dp392">s597dp392</option>
<option value="s397dp095">s397dp095</option>
</select>
$('#bonusVoucher').prop('disabled',false);
jQuery('#bonusVoucher').selectpicker('refresh');
Use selectpicker like this and the most IMPORTANT part is this:
Note: Place your bootsrap selectpicker script after jquery script.
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.17/js/bootstrap-select.min.js"></script>
jQuery solution.
function change() {
if ($('#servergroup option:selected').length) {
$('#servername').attr('disabled', false);
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="servergroup" multiple="multiple" onchange='change()'>
<option value="P1">P1</option>
<option value="P2">P2</option>
<option value="P3">P3</option>
<option value="P4">P4</option>
</select>
<select id="servername" multiple="multiple" disabled>
<option value="s597ap233">s597ap233</option>
<option value="s597dp392">s597dp392</option>
<option value="s397dp095">s397dp095</option>
</select>
First add
<option value="-1"> -Select Server Group- </option>
and
<option value="-1"> -Select Server Name- </option>
to Your Dropdown boxes respectively.
We can achieve requested actions using JQuery as Follows:
$(document).ready(function ()
{
//making serverName Dropdown box disabled by default.
$('#servername').prop('disabled', true);
$('#servergroup').change(function ()
{
if($(this).val == "-1")
{
$('#servername').val = "-1";
$('#servername').prop('disabled', true);
}
else
{
$('#servername').prop('disabled', false);
}
});
});
I have 2 dropdowns, here is the fiddle,
https://jsfiddle.net/oqsf7gjq/1/
<select id="ddlOption">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/><br/>
<select id="ddlCar">
<option value="">- Please select a name -</option>
<option value="1">Volvo</option>
<option value="2">Saab</option>
<option value="3">Mercedes</option>
<option value="4">Audi</option>
</select>
When user selects "Yes" from "ddlOption" dropdown, then I want to show only 2 values (Saab and Audi) for dropdown "ddlCar" and when user selects "No", then I want to see all values for "ddlCar" dropdown.
Please suggest me any possibilities with Jquery code. Thanks!
jsFiddle example
$("#ddlOption").change(function() {
$("#ddlCar").val("").find("[value=1], [value=3]").toggle( this.value==="2" );
});
$("#ddlOption").change(function() {
$("#ddlCar").val("").find("[value=1], [value=3]").toggle( this.value==="2" );
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="ddlOption">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/><br/>
<select id="ddlCar">
<option value="">- Please select a name -</option>
<option value="1">Volvo</option>
<option value="2">Saab</option>
<option value="3">Mercedes</option>
<option value="4">Audi</option>
</select>
Toggle the desired option elements by checking Boolean the first select's value (this.value==="2")
Also, reset to .val("") in order to make sure the second select value is properly cleared from possible previous changes.
$('#ddlOption').change(function(){
var txt = $(this).val();
alert(txt);
if(txt==1){
$('#ddlCar option[value="1"]').hide();
$('#ddlCar option[value="3"]').hide();
}
else{
$('#ddlCar option[value="1"]').show();
$('#ddlCar option[value="3"]').show();
}
});
Fiddle
http://jsfiddle.net/ue4Cm/38/
Tested in Edge, Chrome, Firefox and Internet Explorer 11
Note that hiding and showing the options doesn't work in Edge or IE. The elements need to be really removed.
$(function() {
var $ddlCar = $("#ddlCar");
var $ddlCarOptions = $ddlCar.children("option");
$("#ddlOption").change(function() {
if ($(this).val() === "1") {
$ddlCarOptions.filter(".toggleable").attr("selected", false).remove();
} else {
$ddlCar.empty().append($ddlCarOptions);
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="ddlOption">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/>
<br/>
<select id="ddlCar">
<option value="">- Please select a name -</option>
<option class="toggleable" value="1">Volvo</option>
<option value="2">Saab</option>
<option class="toggleable" value="3">Mercedes</option>
<option value="4">Audi</option>
</select>
Check updated fiddle
In your markup, you need to add classes to the dropdown values first
<select id="ddlOption">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/><br/>
<select id="ddlCar">
<option value="">- Please select a name -</option>
<option value="1">Volvo</option>
<option value="2" class="yes">Saab</option>
<option value="3">Mercedes</option>
<option value="4" class="yes">Audi</option>
</select>
In your jquery code now
$(function() {
$("#ddlOption").change(function() {
var selectedValue = $(this).val();
if (selectedValue == 1)
{
$("#ddlCar option").hide();
$("#ddlCar option.yes").show();
}
else
{
$("#ddlCar option").show();
}
});
});
please check the code below I have made few changes to your code
<script type="text/javascript">
function populateList() {
if($("option:selected",$("#ddlOption")).val()=="1")
{
$(".val1").hide();
$(".val2").show();
}
else if($("option:selected",$("#ddlOption")).val()=="2")
{
$(".val1").show();
$(".val2").hide();
}
else
{
$(".val1").show();
$(".val2").show();
}
}
</script>
<select id="ddlOption" onchange="populateList();">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/><br/>
<select id="ddlCar">
<option value="">- Please select a name -</option>
<option value="1" class="val2">Volvo</option>
<option value="2" class="val1">Saab</option>
<option value="3" class="val2">Mercedes</option>
<option value="4" class="val1">Audi</option>
</select>
let me know if you have any doubts
You can write code as below which is also works for larger object value(300 or whatever size) and it is dynamic.
Here optionOne, optionTwo are object which is bind when Yes/No value selected
Updated Js fiddle link
$(function() {
var optionOne=[{text:"Saab",value:"2"},{text:"Audi",value:"4"}];
var optionTwo=[{text:"Volvo",value:"1"},{text:"Saab",value:"2"},{text:"Mercedes",value:"3"},{text:"Audi",value:"4"}];
$("#ddlOption").change(function() {
var selectedValue=$(this).val();
$('#ddlCar').html('');
var mySelect = $('#ddlCar').append($('<option></option>').val("").html("- Please select a name -"));
if(selectedValue==='1'){
$.each(optionOne, function(index, item) {
mySelect.append($('<option></option>').val(item.value).html(item.text));
});
}else if(selectedValue==='2'){
$.each(optionTwo, function(index, item) {
mySelect.append($('<option></option>').val(item.value).html(item.text));
});
}else{
//To Do if no selection
}
});
});
Try this: https://jsfiddle.net/oqsf7gjq/17/ not the cleanest solution but it will work cross browsing.
$(function() {
var carArray = [];
$('#ddlCar option').each(function() {
carArray.push($(this));
});
$("#ddlOption").change(function() {
if ($('#ddlOption').val() == 1) {
$('#ddlCar option').each(function() {
if ($(this).val() != 2 && $(this).val() != 4) {
$(this).remove();
}
})
} else {
$('#ddlCar option').each(function() {
$(this).remove();
})
for (var i in carArray) {
$('#ddlCar').append(carArray[i])
}
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="ddlOption">
<option value="">- Select an option -</option>
<option value="1">Yes</option>
<option value="2">No</option>
</select>
<br/>
<br/>
<select id="ddlCar">
<option value="0">- Please select a name -</option>
<option value="1">Volvo</option>
<option value="2">Saab</option>
<option value="3">Mercedes</option>
<option value="4">Audi</option>
</select>