jQuery to JavaScript code

Question

I want to convert below jQuery code to pure JavaScript to load with JavaScript function.

HTML

<select name="select" id="select" >
 <option id="EN" value="global.html">Global</option>
 <option id="AU" value="australia.html">Australia</option>
 <option id="ID" value="Indonesia.html">Indonesia</option>
</select>

JS code:

function getCode () {
 var now = new Date().getTime();
 var randomNumber = Math.floor((Math.random() * 100) + 1);
 var uniqueNumber = now + 'a' + randomNumber;
 $.getScript("getCountryCode.js?" + uniqueNumber, function(data, textStatus, jqxhr) {
 if (country){
 var code = country;
 alert("Country code:" + code);
 document.getElementById(code).selected = 'selected';
 document.getElementById('select').onchange.apply();
 }
 });
}

Want to add below code in pure JavaScript format to fix the issue.

$('.selector #select option[id='+code+']').attr('selected', 'selected');
$('.selecto #select').trigger('change');

• Quentin: I'd say that there are three key things that this bit of code does. Which of them is giving you problems? You don't seem to have made any effort to solve this yourself.
• TDG: @Quentin... my code works fine in jquery mode.. After built in jquery only came to know third party scripts are calling through javascript already.
• geckob: youmightnotneedjquery.com

Answer 1

you could try this code:

edited:

document.getElementById(code).selected = 'selected';
document.getElementById('select').onchange.apply();

• TDG: Hi Sekretoz.. thanks for your comments.. I updated my question and code.. Have to my jquery code inside the javascript function. Whether your solution will work on this?
• TDG: getting "Uncaught TypeError: document.getElementsByClassName(...).getElementById is not a function"
• TDG: Yes.. it not changing.. It shows first element on the list as default. Also trigger event not working.
• Sekretoz: options[document.getElementById(code)]. the 'code' their must be the id of your option.ahm let me find another way to trigger the event.
• TDG: any solution found pls? i tried different options.. but still no clue :(