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update select option element with Ajax result

i have two select option list with values retrieved from db .
<select id="userid" onchange="selSuj()">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</select>
<select id="subject">
<div id="determineSubj">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</div>
</select>
<script>
function selSuj(){
var x = $('#userid').val();
$.ajax({
type:'POST',
url:'same page url',
data:{
'userid':x
},
success: function(result){
document.getElementById("determineSubj").innerHTML = result;
}
})
;
}
the first select option(userid),when option selected, should populate the corresponding values in the second select option(subject), using the user option value(eg 1,2,3) as search p.key to the subject db.
I have tried using ajax, it worked out well on alert(result), but does not update the second select option values. please help.

A select should not contain a <div>.
As we can see from this brief demo, doing so makes the div inaccessible to JavaScript, because it doesn't consider it to be a valid part of the DOM:
document.addEventListener("DOMContentLoaded", function() {
console.log(document.getElementById("determineSubj"));
});
<select id="subject">
<div id="determineSubj">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</div>
</select>
In any case, even if it was valid, it's entirely unnecessary for your purpose. You can just update the HTML of the select element directly.
Change the HTML to:
<select id="subject">
<option value="1" selected="selected">text1</option>
<option value="2">text2</option>
<option value="3">text3</option>
</select>
And the "success" callback to:
success: function(result) {
document.getElementById("subject").innerHTML = result;
}
and there shouldn't be any problem.

How to select multiple options if check option from a different select?

I want select multiple option from second select depending on check option from first select.
For example:
adiunkt -> mikroklimat, RTG
agent celny -> zapylenie
First select:
<select name="form[stanowisko][]" id="stanowisko">
<option value="adiunkt">adiunkt</option>
<option value="agent celny">agent celny</option>
</select>
Second select:
<select multiple="multiple" name="form[czynniki_szkodliwe][]" id="czynniki_szkodliwe">
<option value="mikroklimat">mikroklimat</option>
<option value="RTG">RTG</option>
<option value="zapylenie">zapylenie</option>
</select>
I tried this but it not working (select all options after first check):
function tes(){
if (document.getElementById('stanowisko').value ="agent celny") {
document.getElementById('czynniki_szkodliwe').options[2].selected = true;
document.getElementById('czynniki_szkodliwe').options[0].selected = true;
}
if ( document.getElementById('stanowisko').value="adiunkt") {
document.getElementById('czynniki_szkodliwe').options[1].selected = true;
}
}

Pure js solution.
let elem1 = document.getElementById('stanowisko'),
elem2 = document.getElementById('czynniki_szkodliwe');
elem1.addEventListener('change', (e) => {
Array.from(elem2.children).forEach(v => {
return v.disabled = v.getAttribute('data-attr') !== e.target.value;
})
});
<select name="form[stanowisko][]" id="stanowisko">
<option value="">-</option>
<option value="adiunkt">adiunkt</option>
<option value="agent celny">agent celny</option>
</select>
<select multiple="multiple" name="form[czynniki_szkodliwe][]" id="czynniki_szkodliwe">
<option value="mikroklimat" disabled data-attr='adiunkt'>mikroklimat</option>
<option value="RTG" disabled data-attr='adiunkt'>RTG</option>
<option value="zapylenie" disabled data-attr='agent celny'>zapylenie</option>
</select>

You should use a data attribute to mark the options linked to the first select like this:
$(document).ready(function(){
$("#stanowisko").on("change", function(event){
var $options = $("#czynniki_szkodliwe option");
//Unselect all
$options.prop("selected", false);
var val = $("#stanowisko").val();
$options.each(function(idx, item) {
if($(item).data("stanowisko").indexOf(val) >= 0) {
$(item).prop("selected", true);
}
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="form[stanowisko][]" id="stanowisko">
<option value="">Choose</option>
<option value="adiunkt">adiunkt</option>
<option value="agent celny">agent celny</option>
<option vlaue="lekarz">lekarz</option>
</select>
<select multiple="multiple" name="form[czynniki_szkodliwe][]" id="czynniki_szkodliwe">
<option data-stanowisko='["adiunkt"]' value="mikroklimat">mikroklimat</option>
<option data-stanowisko='["adiunkt","lekarz"]' value="RTG">RTG</option>
<option data-stanowisko='["agent celny"]' value="zapylenie">zapylenie</option>
</select>
Edit: If several options, from the first select, refers to the same options in the second select, you can "store" an array in the data attribute in JSON format.
I updated the JS code to handle JSON array in the data attributes instead of a simple string.

getting perticular listbox selected value using javascript

I have html listbox as, which has same name but different id
<select name="dept" id="vrow" >
<option selected="selected" > - Select Department- </option>
<option value="GEN">computer </option>
<option value="SC">mac </option>
<option value="ST">civ </option>
<option value="OBC">ele </option>
</select>
i had atteched it to each row fetched from database,
how can i get ID if i change perticular listbox value.

If you need id then use:
document.getElementById('vrow').addEventListener('change', function(e) {
if (e.target.name==='dept') {
alert(e.target.id);
}
})
Working Demo
If you need value then use:
document.getElementById('vrow').addEventListener('change', function(e){
if (e.target.name==='dept') {
alert(e.target.value);
}
})
Working Demo

You Write Javascript Function or Jquery function
like this
<select onchange="dept(this.value)" name="dept" id="vrow" >
<option selected="selected" > - Select Department- </option>
<option value="GEN">computer </option>
<option value="SC">mac </option>
<option value="ST">civ </option>
<option value="OBC">ele </option>
</select>
<script type="text/javascript">
function dept(id){
$.ajax({
url: 'ajax.php',
data: { id: id} ,
success: function (response) {
try{
alert(response);
}
catch(e){
alert("Error"+e);
}
},
error: function (e) {
alert("error"+e); or alert("error"+JSON.stringify(e));
}
});
}
</script>
Ajax.php

You can add event listener on change event to parent node of all <select> elements it can ul if they are in list or even body.
<script type="text/javascript">
document.getElementByTagName('UL').addEventListener('change', function(e) {
if (e.target.name==='dept') {
//In this case you have got element that you need and its id
//e.target.id
alert(e.target.id);
}
});
</script>

Setting select option with javascript

I have the following select:
<select id="select_produckt" class="form-control">
<option id="select_default" selected="" value="0">Vælg produkt</option>
<option value="1">NP 89,-</option>
<option value="2">NN 89,-</option>
<option value="3">NP 99,-</option>
<option value="4">NN 99,-</option>
<option value="5">NP 119,-</option>
<option value="6">NN 119,-</option>
<option value="7">NP 139,-</option>
<option value="8">NN 139,-</option>
<option value="9">NP 169,-</option>
<option value="10">NN 169,-</option>
<option value="11">NP 239,-</option>
<option value="12">NN 239,-</option>
</select>
Now, I wish to simply set the value of the select with JavaScript (meaning that the options text will be shown).
I've tried the following:
$('#select_produckt').val(2)
This, however, just left the field blank.
Can anyone tell me what the problem is?
Update
$.ajax({
type: 'POST',
url: '/Excel_Data/getSale',
data: {
request: 'ajax',
row_id: id,
list_id: list_id
},
success: function (data) {
$('#product_selection').removeClass('hidden');
alert(parseInt(data))
$('#select_produckt').val(""+data)
}
});

Try this:
$('#select_produckt').find('option')[2].selected = true;
http://jsfiddle.net/qwJKV/

Javascript Conditional Fields (Zendesk Lotus)

I am trying to configure some javascript code to make a conditional field app in Zendesk Lotus. Below is the javascipt template and my current html. Could someone give me an example of how I would change the java template to suit my html? I would like to only show the second drop down form field (ticket_fields_21552756) when the option 'qa' is selected from the first drop down list (ticket_fields_21013678). Once someone shows me how to do this I will be able to do the rest myself :)
PS, the javascript must stay in the below format.
Thanks in advance for the help!
Javascript:
(function(){
var projectRequest = ['280865'],
otherHelpesk = ['279466'],
hideAll = [].concat(projectRequest, otherHelpesk),
moodFieldMap = {
cat:[].concat(projectRequest),
dog:[].concat(otherHelpesk),
dolphin: [].concat(projectRequest, otherHelpesk)
};
return {
appID: 'https://github.com/zendesk/widgets/tree/master/ConditionalFieldsApp',
defaultState: 'loading',
type2thing: '',
events: {
'app.activated': 'setValue',
'ticket.custom_field_21631456.changed': 'typeII'
}, //end events
typeII: function(){
this.hide(hideAll);
this.type2thing = this.ticket().customField('custom_field_21631456');
//console.log('control field value: ' + this.type2thing);
if (this.type2thing != null) {
this.show(moodFieldMap[this.type2thing]);
}
},
setValue: function() {
//console.log('activated', arguments);
this.typeII();
},
hide: function(fields){
fields.forEach(function(field) {
this.ticketFields('custom_field_' + field).hide();
}, this);
},
show: function(fields) {
fields.forEach(function(field) {
this.ticketFields('custom_field_' + field).show();
}, this);
}
};
}());
My HTML:
<select id="ticket_fields_21013678" name="ticket[fields][21013678]" tabindex="8"><option value="">-</option>
<option value="depreqaccount_management">Account Management</option>
<option value="ce_vp">CE/VP</option>
<option value="city_management">City Management</option>
<option value="city_planning">City Planning</option>
<option value="customer_service">Customer Service</option>
<option value="depreq_images">Images</option>
<option value="partner_management">Partner Management</option>
<option value="production">Production</option>
<option value="qa">QA</option>
<option value="senior_management">Senior Management</option>
<option value="depreq_writers">Writers</option>
<option value="depreq_bdm">BDM</option></select>
<select id="ticket_fields_21552756" name="ticket[fields][21552756]" tabindex="9"><option value="">-</option>
<option value="responsibility_account_manager">Account Manager</option>
<option value="responsibility_bdm">BDM</option>
<option value="responsibility_ce_vp">CE/VP</option>
<option value="responsibility_city_manager">City Manager</option>
<option value="responsibility_city_planner">City Planner</option>
<option value="responsibility_customer_service">Customer Service</option>
<option value="responsibility_image_designer">Images</option>
<option value="responsibility_merchant">Merchant</option>
<option value="responsibility_partner_manager">Partner Manager</option>
<option value="responsibility_producer">Producer</option>
<option value="responsibility_qa">QA</option>
<option value="responsibility_writer">Writer</option></select>

You can see the latest version of the new Zendesk agent interface at https://github.com/zendesklabs/conditional_fields_app