JSFiddle - React, Tailwind, and code Playground
by Nick Craver
HTML
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<select name='galaddvenn' class='sel_add vl hidden' multiple='multiple'>
<option value='53'>name1</option>
<option value='352'>name2</option>
<option value='632'>name3</option>
<option value='543'>name4</option>..etc
</select>
<button>Test</button><br />
<span></span>
JavaScript
$("button").click(function() {
$("span").text($("select").serialize());
});