aligning HTML select elements on one line - javascript

i am working on a mobile app using HTML/CSS/JavaScript. I have two select option (drop down menu), one for number of dates and the other one for number of years. I want to be able to see these select options in one line, but no matter what I do, I get a drop down menu (number of dates) on one line and on the next line I get the drop down menu for number of years. Below you can see my codes
<div data-role="controlgroup" data-type = "horizontal" >
<label for="select-choice-1" >Choose Expiry Date</label>
<select name="select-choice-1" id="select-choice-1" data-inline = "true" style = "float: left">
<option value="1">01</option>
<option value="2">02</option>
<option value="3">03</option>
<option value="4">04</option>
<option value="5">05</option>
<option value="6">06</option>
<option value="7">07</option>
<option value="8">08</option>
<option value="9">09</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select>
<select name="select-year" id="select-yaer" data-inline = "true" style = "float: right"/>
<option value="2011">2011</option>
<option value="2012">2012</option>
<option value="2013">2013</option>
<option value="2014">2014</option>
<option value="2015">2015</option>
<option value="2016">2016</option>
<option value="2017">2017</option>
<option value="2018">2018</option>
<option value="2019">2019</option>
<option value="2020">2020</option>
<option value="2021">2021</option>
<option value="2022">2022</option>
<option value="2023">2023</option>
<option value="2024">2024</option>
<option value="2025">2025</option>
<option value="2026">2026</option>
<option value="2027">2027</option>
<option value="2028">2028</option>
<option value="2029">2029</option>
<option value="2030">2030</option>
</select><br />
</div>
UPDATE:
I am testing these codes on Android browser using jQuery mobile framework.


Try floating both select tags left and adding a clear:both to the styling on the label. If you want the label above the two selects, just add a <br /> right below the label.
It would look something like
<label>Label Value</label>
<select>
<option>Etc...</option>
</select>
<select>
<option>Second select option...</option
</select>
and the CSS would be
label {
clear:both;
}
select {
float:left;
}
Also, as a heads-up, you end your second select tag before the first option tag, so they aren't included.
<select name="select-year" id="select-yaer" data-inline = "true" style = "float: right"/>. You need to get rid of the / right before the ending of the tag.


It's the width on the ui-select class that's causing your issue, Setting the width to auto should correct the issue. jQM adds a ton of extra markup for the look and feel on the page to be consistent across multiple devices. If you view the page source in a browser such as Chrome or FireFox you can see the extra elements. In your case you needed to modify the ui-select class as it has a width of 60% as the default.
Live Example:
http://jsfiddle.net/phillpafford/trdYP/47/
JS:
$('#select-choice-1').parent().parent().css('width','auto');
HTML:
<div data-role="page" id="home">
<div data-role="content">
<div data-role="controlgroup" data-type="horizontal" data-inline="true">
<label for="select-choice-1" data-inline="true">Choose Expiry Date</label>
<select name="select-choice-1" id="select-choice-1" data-inline="true">
<option value="1">01</option>
<option value="2">02</option>
<option value="3">03</option>
<option value="4">04</option>
<option value="5">05</option>
<option value="6">06</option>
<option value="7">07</option>
<option value="8">08</option>
<option value="9">09</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select>
<select name="select-year" id="select-yaer" data-inline="true">
<option value="2011">2011</option>
<option value="2012">2012</option>
<option value="2013">2013</option>
<option value="2014">2014</option>
<option value="2015">2015</option>
<option value="2016">2016</option>
<option value="2017">2017</option>
<option value="2018">2018</option>
<option value="2019">2019</option>
<option value="2020">2020</option>
<option value="2021">2021</option>
<option value="2022">2022</option>
<option value="2023">2023</option>
<option value="2024">2024</option>
<option value="2025">2025</option>
<option value="2026">2026</option>
<option value="2027">2027</option>
<option value="2028">2028</option>
<option value="2029">2029</option>
<option value="2030">2030</option>
</select>
</div>
</div>
</div>


If you make them both float left they will sit side by side, as long as their combined widths don't exceed the width of the container.

Related

Need form to redirect user if they select age below 18

I am working on a site with an html form, and the form requires the user to submit their age.
The user's age will be used for various purposes through-out the website's program.
However, if the user is under the age of 18, they are not eligible to participate in the program anyway.
Therefore... if the user selects 'Under 18' in the form, and then tries to click the 'continue' (submit) button, I need the form to automatically redirect the user to another URL.
I have tried several php, and a few javascript solutions, but so far, no dice.
And help or advice would be greatly appreciated.
I have included the form page which asks for the user's age.
Form Page
<!DOCTYPE html>
<head>
<title>Form Page</title>
</head>
<body>
<form action="nextPage.php" method="POST">
Please select your age:<br><br>
<select id="userAge" name="userAge" class="ageField" required>
<option value="0" selected="selected" disabled="disabled">Age</option>
<option value="Under 18">Under 18</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
<option value="32">32</option>
<option value="33">33</option>
<option value="34">34</option>
<option value="35">35</option>
<option value="36">36</option>
<option value="37">37</option>
<option value="38">38</option>
<option value="39">39</option>
<option value="40">40</option>
<option value="41">41</option>
<option value="42">42</option>
<option value="43">43</option>
<option value="44">44</option>
<option value="45">45</option>
<option value="46">46</option>
<option value="47">47</option>
<option value="48">48</option>
<option value="49">49</option>
<option value="50">50</option>
<option value="51">51</option>
<option value="52">52</option>
<option value="53">53</option>
<option value="54">54</option>
<option value="55">55</option>
<option value="56">56</option>
<option value="57">57</option>
<option value="58">58</option>
<option value="59">59</option>
<option value="60+">60+</option>
</select>
<br><br><br>
<input type="submit" class="continueButton" value="Continue">
</form>
</div>
</body>
</html>

I would do this in Javascript Before its submitted to the PHP page
function detectChange(ageData) {
console.log(ageData.value)
if (ageData.value == 10)
{
console.log("Kick user")
window.location.href = "http://www.w3schools.com";
}
}
<select id="osDemo" onchange="detectChange(this)">
<option value="None">None</option>
<option value="10">under18</option>
<option value="19">19</option>
<option value="20">20</option>
</select>

Change dropdown options using javascript on Apple.com SOLVE THIS LUNCH ON ME

Trying to change selected options using javascript, but for some reason doesn't work. Voyaged all over the internet to find a solution but couldn't find one. Help Needed !
To get the to Source code go to
https://www.apple.com/shop/trade-in, at
"Select your device to get a trade-in estimate"
Select Smartphone, Apple, iPhone XS MAX, Select Yes for good condition,
Select Box "Trade in for gift Card".
Then you should see a form field, and that darn default state option wont change for me dynamically, using javascript in the console.
Now try to change the state in console to MA (Massachusetts).
It is currently default 'state'.
First person to solve this lunch is on me, dropdown your PayPal email.
Or send your email address to arizona777#gmail.com. Thank you !
:)
Source Code :
<select aria-required="true" aria-describedby="tradeUp.shipping.moduleData.address-state-error"
aria-invalid="false" data-autom="address-field-state" value=""
data-recon-click="binding,actionClick,tradeUp.shipping.moduleData.address.state,binding"
data-recon-mouseover="binding,actionMouseOver,tradeUp.shipping.moduleData.address.state,binding"
data-recon-mouseout="binding,actionMouseOut,tradeUp.shipping.moduleData.address.state,binding"
data-recon-input="binding,setValue,tradeUp.shipping.moduleData.address.state,binding"
data-recon-change="binding,setValue,tradeUp.shipping.moduleData.address.state,binding"
data-recon-focusin="binding,setFocus,tradeUp.shipping.moduleData.address.state,binding"
data-recon-focusout="binding,clearFocus,tradeUp.shipping.moduleData.address.state,binding"
id="tradeUp.shipping.moduleData.address-state" required=""
class="form-dropdown form-dropdown-selectnone">
<option value="" selected="true">State</option>
<option value="AA">AA</option>
<option value="AE">AE</option>
<option value="AP">AP</option>
<option value="AL">AL</option>
<option value="AK">AK</option>
<option value="AZ">AZ</option>
<option value="AR">AR</option>
<option value="AS">AS</option>
<option value="CA">CA</option>
<option value="CO">CO</option>
<option value="CT">CT</option>
<option value="DE">DE</option>
<option value="DC">DC</option>
<option value="FL">FL</option>
<option value="GA">GA</option>
<option value="GU">GU</option>
<option value="HI">HI</option>
<option value="ID">ID</option>
<option value="IL">IL</option>
<option value="IN">IN</option>
<option value="IA">IA</option>
<option value="KS">KS</option>
<option value="KY">KY</option>
<option value="LA">LA</option>
<option value="ME">ME</option>
<option value="MD">MD</option>
<option value="MA">MA</option>
<option value="MI">MI</option>
<option value="MN">MN</option>
<option value="MS">MS</option>
<option value="MO">MO</option>
<option value="MT">MT</option>
<option value="MP">MP</option>
<option value="NE">NE</option>
<option value="NV">NV</option>
<option value="NH">NH</option>
<option value="NJ">NJ</option>
<option value="NM">NM</option>
<option value="NY">NY</option>
<option value="NC">NC</option>
<option value="ND">ND</option>
<option value="OH">OH</option>
<option value="OK">OK</option>
<option value="OR">OR</option>
<option value="PA">PA</option>
<option value="PI">PI</option>
<option value="PR">PR</option>
<option value="PW">PW</option>
<option value="RI">RI</option>
<option value="SC">SC</option>
<option value="SD">SD</option>
<option value="TN">TN</option>
<option value="TX">TX</option>
<option value="UT">UT</option>
<option value="US">US</option>
<option value="VT">VT</option>
<option value="VA">VA</option>
<option value="VI">VI</option>
<option value="WA">WA</option>
<option value="WV">WV</option>
<option value="WI">WI</option>
<option value="WY">WY</option>
</select>

Edit:
I now managed to get to the dialog mentioned. If you execute the following in the console you should be able to change the state to 'MA'
ch=new MouseEvent('change', {view:window,bubbles:true});
s=document.getElementById('tradeUp.shipping.moduleData.address-state');
s.value='MA';
s.dispatchEvent(ch);
It looks like the bootstrap surroundings of the select box expect a change event, which we can generate with the above commands.
After some further testing I found that {bubbles:true} is sufficient as the "option" argument in the above code (you could leave out the view:window part).
In case you had problems in addressing the select element with its unusual id: you need to mask the . characters in it, since otherwise they would be interpreted as special characters indicating class identifiers. So, the selector for document.querySelector() needs to be something like '#tradeUp\\.shipping\\.moduleData\\.address-state'.
In some further lines below you will find a way of changing the current selection of the select element. In this case I changed it to 'MA'.
document.querySelector('#change').addEventListener('click',function(){
document.querySelector('#tradeUp\\.shipping\\.moduleData\\.address-state').innerHTML=
['abc','def','ghi','jki','lmn'].map(function(s){return '<option>'+s+'</option>';}).join('');
})
// in case you wanted to change the value of the
// select programmatically, do the following:
document.querySelector('#tradeUp\\.shipping\\.moduleData\\.address-state').value='MA';
<select aria-required="true" aria-describedby="tradeUp.shipping.moduleData.address-state-error"
aria-invalid="false" data-autom="address-field-state" value=""
data-recon-click="binding,actionClick,tradeUp.shipping.moduleData.address.state,binding"
data-recon-mouseover="binding,actionMouseOver,tradeUp.shipping.moduleData.address.state,binding"
data-recon-mouseout="binding,actionMouseOut,tradeUp.shipping.moduleData.address.state,binding"
data-recon-input="binding,setValue,tradeUp.shipping.moduleData.address.state,binding"
data-recon-change="binding,setValue,tradeUp.shipping.moduleData.address.state,binding"
data-recon-focusin="binding,setFocus,tradeUp.shipping.moduleData.address.state,binding"
data-recon-focusout="binding,clearFocus,tradeUp.shipping.moduleData.address.state,binding"
id="tradeUp.shipping.moduleData.address-state" required=""
class="form-dropdown form-dropdown-selectnone">
<option value="" selected="true">State</option><option value="AA">AA</option>
<option value="AE">AE</option>
<option value="AP">AP</option>
<option value="AL">AL</option>
<option value="AK">AK</option>
<option value="AZ">AZ</option>
<option value="AR">AR</option>
<option value="AS">AS</option>
<option value="CA">CA</option>
<option value="CO">CO</option>
<option value="CT">CT</option>
<option value="DE">DE</option>
<option value="DC">DC</option>
<option value="FL">FL</option>
<option value="GA">GA</option>
<option value="GU">GU</option>
<option value="HI">HI</option>
<option value="ID">ID</option>
<option value="IL">IL</option>
<option value="IN">IN</option>
<option value="IA">IA</option>
<option value="KS">KS</option>
<option value="KY">KY</option>
<option value="LA">LA</option>
<option value="ME">ME</option>
<option value="MD">MD</option>
<option value="MA">MA</option>
<option value="MI">MI</option>
<option value="MN">MN</option>
<option value="MS">MS</option>
<option value="MO">MO</option>
<option value="MT">MT</option>
<option value="MP">MP</option>
<option value="NE">NE</option>
<option value="NV">NV</option>
<option value="NH">NH</option>
<option value="NJ">NJ</option>
<option value="NM">NM</option>
<option value="NY">NY</option>
<option value="NC">NC</option>
<option value="ND">ND</option>
<option value="OH">OH</option>
<option value="OK">OK</option>
<option value="OR">OR</option>
<option value="PA">PA</option>
<option value="PI">PI</option>
<option value="PR">PR</option>
<option value="PW">PW</option>
<option value="RI">RI</option>
<option value="SC">SC</option>
<option value="SD">SD</option>
<option value="TN">TN</option>
<option value="TX">TX</option>
<option value="UT">UT</option>
<option value="US">US</option>
<option value="VT">VT</option>
<option value="VA">VA</option>
<option value="VI">VI</option>
<option value="WA">WA</option>
<option value="WV">WV</option>
<option value="WI">WI</option>
<option value="WY">WY</option>
</select>
<button id="change">change options</button>

How to get age based on month/day/year dropdown in FireFox

I am trying to get the age of users based on the month date and year field they enter in the dropdown. This is working in Chrome and other browsers but in Firefox I get an Invalid Date Error:
jQuery('#cons_birth_date_YEAR,#cons_birth_date_MONTH,#cons_birth_date_DAY').on('change',function(){
var selectedYear=$('#cons_birth_date_YEAR').find('option:selected').val();
var selectedDay=$('#cons_birth_date_DAY').find('option:selected').val();
var selectedMonth=$('#cons_birth_date_MONTH').find('option:selected').val();
if(selectedYear!=0 && selectedMonth!=0 && selectedDay!=0)
{
var today = new Date();
var dob=new Date(selectedDay+"/"+selectedMonth+"/"+selectedYear);
console.log(dob);
var age = new Date(today - dob).getFullYear() -1970;
$("#age").val(age);
}
if (age < 13) {
alert('under 13');
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<fieldset>
<legend>
<span class="aural-only cons_dob"></span>
<span class="input-label survey-question-label cons_dob">Date of Birth:</span>
</legend>
<span class="input-container">
<span id="cons_birth_date_date" title="Date:">
<select name="cons_birth_date_MONTH" id="cons_birth_date_MONTH" title="Month">
<option value="0">Month
</option>
<option value="1" selected="selected">Jan</option>
<option value="2">Feb</option>
<option value="3">Mar</option>
<option value="4">Apr</option>
<option value="5">May</option>
<option value="6">Jun</option>
<option value="7">Jul</option>
<option value="8">Aug</option>
<option value="9">Sep</option>
<option value="10">Oct</option>
<option value="11">Nov</option>
<option value="12">Dec</option>
</select>
<select name="cons_birth_date_DAY" id="cons_birth_date_DAY" title="Day">
<option value="0">Day
</option>
<option value="1">1</option>
<option value="2" selected="selected">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>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select>
<select name="cons_birth_date_YEAR" id="cons_birth_date_YEAR" title="Year">
<option value="0">Year
</option>
<option value="1997" selected="selected">1997</option>
<option value="1998">1998</option>
<option value="1999">1999</option>
<option value="2000">2000</option>
<option value="2015">2015</option>
<option value="2016">2016</option>
<option value="2017">2017</option>
<option value="2018">2018</option>
<option value="2019">2019</option>
</select>
</span>
</span>
</fieldset>
This script adds an alert if a user is under 13 years of age. This works in Chrome but in Firefox, the line below is returning the error: Invalid Date
var dob=new Date(selectedDay+"/"+selectedMonth+"/"+selectedYear);

Try with this:
var dateSTR = "2019-07-02";
var dob = new Date(dateSTR.replace(/-/g,"/"));
You can read this and check the crossbrowsing problems.

DOB menu that opens in middle of list with overflow shown - Age restricted

I am looking for a solution to create a scrollable DOB selector menu (one for month/day/and year) that opens in the middle of the list with the date current year - 18, using HTML, CSS, JS, jQuery, or bootstrap. I have been struggling to find a solution that allows a menu to open in the middle options with the top overflow still visible. I've seen some solutions to get the current year - 18 but none with the middle opening.
I'm starting to question if this is even possible and only an option with year select menu for the iPhone.
Rough idea on what I am looking to do
I'm also interested in hearing any alternative ideas you guys would have to have a quicker and more accessible way to have users input their DOB's, maybe something like the IOS Date picker but a desktop alternative.
What I have so far, basic DOB dropdown
<select name="DOBMonth">
<option> - Month - </option>
<option value="January">January</option>
<option value="Febuary">Febuary</option>
<option value="March">March</option>
<option value="April">April</option>
<option value="May">May</option>
<option value="June">June</option>
<option value="July">July</option>
<option value="August">August</option>
<option value="September">September</option>
<option value="October">October</option>
<option value="November">November</option>
<option value="December">December</option>
</select>
<select name="DOBDay">
<option>Day</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>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select>
<select name="DOBYear">
<option>Year</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>
<option value="1980">1980</option>
<option value="1979">1979</option>
<option value="1978">1978</option>
<option value="1977">1977</option>
<option value="1976">1976</option>
<option value="1975">1975</option>
<option value="1974">1974</option>
<option value="1973">1973</option>
<option value="1972">1972</option>
<option value="1971">1971</option>
<option value="1970">1970</option>
<option value="1969">1969</option>
<option value="1968">1968</option>
<option value="1967">1967</option>
<option value="1966">1966</option>
<option value="1965">1965</option>
<option value="1964">1964</option>
<option value="1963">1963</option>
<option value="1962">1962</option>
<option value="1961">1961</option>
<option value="1960">1960</option>
<option value="1959">1959</option>
<option value="1958">1958</option>
<option value="1957">1957</option>
<option value="1956">1956</option>
<option value="1955">1955</option>
<option value="1954">1954</option>
<option value="1953">1953</option>
<option value="1952">1952</option>
<option value="1951">1951</option>
<option value="1950">1950</option>
<option value="1949">1949</option>
<option value="1948">1948</option>
<option value="1947">1947</option>
</select>
</div>
</body>`
Thank you!

How to combine values from three different fields and set it to the hidden field only when all the three fields are filled with values?

I've six fields on a form for showing the start time and end time in Hour: Minutes AM/PM format as follows :
<div class="block-time-term" style="padding-bottom:10px;">
<label>Starts at :</label>
<select name="hours_start" id="hours_start">
<option value="">hh</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>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>
<select name="minutes_start" id="minutes_start">
<option value="">mm</option>
<option value="0">00</option>
<option value="5">05</option>
<option value="10">10</option>
<option value="15">15</option>
<option value="20">20</option>
<option value="25">25</option>
<option value="30">30</option>
<option value="35">35</option>
<option value="40">40</option>
<option value="45">45</option>
<option value="50">50</option>
<option value="55">55</option>
</select>
<select name="am_pm_start" id="am_pm_start">
<option value="AM">AM</option>
<option value="PM">PM</option>
</select>
<br><br>
<label>Ends at :</label>
<select name="hours_end" id="hours_end">
<option value="">hh</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>
<option value="9">9</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
</select>
<select name="minutes_end" id="minutes_end">
<option value="">mm</option>
<option value="0">00</option>
<option value="5">05</option>
<option value="10">10</option>
<option value="15">15</option>
<option value="20">20</option>
<option value="25">25</option>
<option value="30">30</option>
<option value="35">35</option>
<option value="40">40</option>
<option value="45">45</option>
<option value="50">50</option>
<option value="55">55</option>
</select>
<select name="am_pm_end" id="am_pm_end">
<option value="AM">AM</option>
<option value="PM">PM</option>
</select>
</div>
Now there are two hidden fields present on the form as follows :
<input type="hidden" name="val[start_time]" id="start_time" value=""/>
<input type="hidden" name="val[end_time]" id="end_time" value=""/>
Now what I want to do is when user selects all the values from the respective drop downs only then the selected values should get combined and should be stored in respecive hidden fields.
For example if user selects Start Time as follows 2 from Hour, 30 from Minutes and PM then the string to be formed and to be stored should be 02:35 PM. Same should be applicable to end date.
If anything is missing proper alert message should appear. How should I achieve this using jQuery/Javascript?
Thanks.

I have created a JSFiddle for you. I made the hidden text boxes visible for you to check the output. It's better to replace the alert messages with a DIV in production. Hope this helps.
http://jsfiddle.net/su8898/m5r140cy/4/

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