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Get the selected value in google app script

How to pass a select box value.
I have a spreadsheet where i want to filter based on a select box value.
I made a way to call the app function on form submit. But I am not able to pass one more parameter at the other side.
I want to filter based on the select box value and thereby retrieve the result from the spreadsheet on to the web app. This is my selectbox in html.
Select DATA
<select name ="productId" id="gettheVAL">
<option>DATA1 </option>
<option>DATA2 </option>
<option>DATA3 </option>
</select>
Can anyone guide me on this? I have called the function via this
form.on('submit', function(event){
event.preventDefault();
runner.withSuccessHandler(function(array){
for (var i = 0; i < array.length; i++) {
var item = '<tr><td>' + array[i] +'</td></tr>';
table.append(item);
}
}).retrieveValuesFromForm(this);
Update
Adding the function - retrieveValuesFromForm below:
function retrieveValuesFromForm(req) {
//var selectedvalue=$('input[name="gettheSelectValue"]:checked').val();// tried like this but $ is undefined here
var sheetActive = SpreadsheetApp.openById("SHEETID");
var sheet = sheetActive.getSheetByName("SHEETNAME");
var range = sheet.getRange('A:U');
var rawData = range.getValues();
var data = [];
for (var i = 0; i < rawData.length; i++) {
if ((rawData[i][2] == selectedvalue)) // Check to see if column 3 says selectedvalue if not skip it
{
//processing
}
}
return data;
}

Based on the assumption that you have a field in your form such as
<select name ="productId" id="gettheVAL">
In your form, You could call your Google App Script function with the following parameter
runner.withSuccessHandler(function(array){
...
}).retrieveValuesFromForm($("#gettheVAL").val());
You would then change the signature for retriveValuesFromForm
function retrieveValuesFromForm(selectVal) {
...
}

Here's how I pass a selected option and a few other things.
function sendText()
{
var culr=$('input[name="priority"]:checked').val();
var type=$('#sel1').val();
var txt=$('#txt1').val();
var obj={'type':type,'text':txt,'color':culr};
$('#txt1').css('background-color','#ffff00');
google.script.run
.withSuccessHandler(clearText)
.dispText(obj);
}
I'm guessing that you need to add this line into your head tag area.
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Js on change dropdown

I have a form that has a hidden text input that gets the user id called user_number_id and depending on the value the dropdown called departamento_drop gets an options filtered to retorno1. The problem is that when I open this form to edit something inside it, the selected option of this dropdown changes automatically and changes the real selected value. How can I keep the selected value selected and make sure the filter can understand that and have to respect it?
$("#user_number_id").val(function(){
var selecionado = $(this).val();
jQuery.get("<?php echo base_url().'departamentos/filter_departamento/'; ?>"+selecionado,
function(retorno1){
var ret1 = '<option value="0">------ N/A ------</option>' + retorno1;
var ret2 = retorno1 + '<option value="0">------ N/A ------</option>';
if($("#departamento_drop option:selected").val() > '0'){
jQuery("#departamento_drop").html(ret2);
}else{
jQuery("#departamento_drop").html(ret1);
}
});
});

after 9 hours of work on it, I done this solution but still I need to find how to remove the selected option from retorno1 to not be duplicated, and for sure if there is any other idea better please share. thank you
$("#user_number_id").val(function(){
var selecionado = $(this).val();
jQuery.get("<?php echo base_url().'departamentos/filter_departamento/'; ?>"+selecionado,
function(retorno1){
var i = 0;
var pre = retorno1 + '<option value="0">------ N/A ------</option>';
var count = $($.parseHTML(retorno1)).filter('option').length;
var dep_dr = $("#departamento_drop option:selected").val();
for(i=0; i < count; i++){
var val_drop = $($.parseHTML(retorno1)).filter("option[value*='" + i + "']").val();
var text_drop = $($.parseHTML(retorno1)).filter("option[value*='" + i + "']").text();
if (val_drop == dep_dr){
jQuery("#departamento_drop").html("<option value ='"+val_drop+"' selected='selected'>"+text_drop+"</option>"+pre);
}else if(dep_dr == '0'){
jQuery("#departamento_drop").html("<option value ='"+dep_dr+"' selected='selected'>------ N/A ------</option>"+pre);
}
}
});
});

Conditional drop down menu in javascript, problems with the selector

I have a conditional dropdown menu which works but it depends on where I put it on the page. If I don't put it in a specific position the positions in the menu don't fill at all. The problem is also that I want to add a second conditional dropdown, and that one doesn't work regardless of where I put it. So my question is: do I need to add the script twice on the page to correspond the two forms I have? I actually want both drop downs to fill with the exact same words.
document.forms[0]['List'+i].length = 1;
document.forms[0]['List'+i].selectedIndex = 0;
I'm guessing it's something related with the [0] there. I tried adding an id to the form and then writing the the second script document.forms('myId')[] but that didn't work either. How should I go about doing this?
<script type="text/javascript">
var categories = [];
categories["startList"] = ["Programming","Science","History","Business and Economics","Software","Languages","Do it Yourself","Others"];
categories["Programming"] = ["Java","C++","C.","Python","Html","Php","Mysql","ObjectiveC","Android","Others"];
categories["Science"] = ["Mathematics","Physics","Biology","Chemistry","Medicine","Astronomy","Statistics","Others"];
categories["Others"] = ["All"]
var nLists = 2; // number of lists in the set
function fillSelect(currCat,currList){
var step = Number(currList.name.replace(/\D/g,""));
for (i=step; i<nLists+1; i++) {
document.forms[0]['List'+i].length = 1;
document.forms[0]['List'+i].selectedIndex = 0;
}
var nCat = categories[currCat];
for (each in nCat) {
var nOption = document.createElement('option');
var nData = document.createTextNode(nCat[each]);
nOption.setAttribute('value',nCat[each]);
nOption.appendChild(nData);
currList.appendChild(nOption);
}
}
function getValue( L2, L1) {
$.post( "", { List1: L1, List2: L2 } );
}
function init() {
fillSelect('startList',document.forms[0]['List1'])
}
navigator.appName == "Microsoft Internet Explorer" ? attachEvent('onload', init, false) : addEventListener('load', init, false);
</script>
<form action="" method="post">
<select name='List1' onchange="fillSelect(this.value,this.form['List2'])">
<option selected>Category</option>
</select>
<select name='List2' onchange="getValue(this.value,this.form['List1'].value)">
<option selected >Subcategory</option>
</select>
<input type="Submit">

Fixed it. I just had to add either a selector or 1 there to correspond to my second form.
document.forms[1]['List'+i].length = 1;
document.forms[1]['List'+i].selectedIndex = 0;
}
var nCat = categories[currCat];
for (each in nCat) {
var nOption = document.createElement('option');
var nData = document.createTextNode(nCat[each]);
nOption.setAttribute('value',nCat[each]);
nOption.appendChild(nData);
currList.appendChild(nOption);
}
}
function getValue( L2, L1) {
$.post( "", { List1: L1, List2: L2 } );
}
function init() {
fillSelect('startList',document.forms[1]['List1'])

Dynamic Select Drop Box Generation Containing PHP Data

I need some help generating multiple select boxes. I am able to generate new boxes but they do not contain the SQL data that the boxes should have. I will link my javascript code first.
<script>
function add_file_field2(){
var container2=document.getElementById('file_container2');
var file_field2=document.createElement('select');
file_field2.name='animalCommony[]';
file_field2.type='animalCommony';
file_field2.value = 'animalCommony[]';
file_field2.text = 'animalCommony';
container2.appendChild(file_field2);
var br_field=document.createElement('br');
container2.appendChild(br_field);
}
function remove_field2() {
var container2=document.getElementById('file_container2');
lastChild = container2.lastChild;
if(lastChild !=0) {
container2.removeChild(lastChild);
file_field-= 1;
}
}
</script>
So I am not sure how I need to modify that code to generate the correct select boxes.
Here is my php code:
<?php
$db = get_db_connection('swcrc');
$db->connect();
$db->query("SELECT [ID], [Common_Name], [Scientific_Name] FROM dbo.All_Animals");
while($row = $db->fetch())
{
?>
<option value="<?php echo $row['Common_Name'];?> - <?php echo $row['Scientific_Name'];?>"><?php echo $row['Common_Name'];?> - <em><?php echo $row['Scientific_Name'];?></em></option>
<?php
}
?>
</select>
</div>
</p>
<p>
Add Another Animal
<br />
Remove Animal<br />
<br>
</p>
Finally I will have a screenshot of what it looks like after hitting the 'add another animal button' twice. Thank you for your help!
As you can see empty select boxes are generated.
Screen shot including an example of the kind of data that should populate the added boxes.
Screenshot of database

If all you want to do is copy the contents of the selection box, you don't need to query SQL again. Here's a javascript function that will do the copy, assuming your original selection box has id "myselect." I've also left you a jsfiddle below.
window.add_file_field2 = function () {
function copySelect(select) {
var newSelect = document.createElement('select');
newSelect.name = 'animalCommony[]';
newSelect.type = 'animalCommony';
newSelect.value = 'animalCommony[]';
newSelect.text = 'animalCommony';
for (var i = 0;i < select.options.length;i++) {
var option = document.createElement('option')
option.value = select.options[i].value
option.text = select.options[i].text
newSelect.appendChild(option)
}
return newSelect
}
var container2 = document.getElementById('file_container2');
container2.appendChild(copySelect(document.getElementById("myselect")));
var br_field = document.createElement('br');
container2.appendChild(br_field);
}
Here is a jsfiddle

Need a solution to this javascript coding problem

I have a SELECT in a FORM.
This select is populated using js.
I need to add a "Selected" attribute to one of these options.
I get which one, by checking a MySql database to see the name of the community which needs to have a "selected attribute" added to it.
<select name="community" id="community">
//OPTIONS HERE
</select>
The filler() function:
function filler(com){
//com is the options which needs to be selected, this variables value comes from the mysql database
var community = document.getElementById("community");
var area = document.getElementById("area").value;
// area is just another input on the page which value also is fetched from mysql db. Each area has x communities, so I have alot of IF:s.
if(area == 'Blekinge') {
community.length = 6;
community.options[0].value = "Välj Kommun";
community.options[0].text = "-- Välj Kommun --";
community.options[0].id = "Välj Kommun";
community.options[1].value = "Karlshamn";
community.options[1].text = "Karlshamn";
community.options[1].id = "Karlshamn";
community.options[2].value = "Karlskrona";
community.options[2].text = "Karlskrona";
community.options[2].id = "Karlskrona";
community.selected = 0;
}
}
As you can see, "com" variable is the option which needs to have the "selected" attribute added to it.
I have over 30 of these if-statements, and I have no clue how to create a function to add this "Selected" attribute to the matching option.
So I have "com" which for example could be "Karlskrona" in the example above. How should I add the selected to it?
I need a simple function for this which works in all major browsers...

Set the selectedIndex property of the SELECT to whichever index you need. Zero-based, of course.

Just do
community.value = com;
example at http://www.jsfiddle.net/jMapA/

for(var i = 0; i < community.options.length; i++) {
if(community.options[i].id == com)
community.selectedIndex = i;
}

function selectOptionValue(selectId, value)
{
select = document.getElementById(selectId);
if (select)
{
for (var i = 0; i < select.options.length)
{
if (select.options[i].value == value)
{
select.options[i].selected = 'selected';
return true;
}
}
}
return false;
}
Use my function like this:
selectOptionValue('community', 'Karlskrona');