setBusbdhome.user.js

// ==UserScript==
// @name         Set Busbd Home
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        *.busbd.com.bd*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var element=document.getElementById("searchmenu_leavingform");
    element.value="14";
    // Create a new 'change' event
    var event = new Event('change');
    // Dispatch it.
    element.dispatchEvent(event);
    document.getElementById("searchmenu_goingto").value="55";
    //document.getElementById("searchmenu_departingon").value="12/06/2018";
    document.getElementById("searchmenu_coachtype").value="1";
    document.getElementById("searchmenu_submitbutton").click();
})();