jQuery Selectric Highlight Events

HTML

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<select name="Country" id="Country" multiple><option>Land *</option><option value="Afghanistan">Afghanistan</option><option value="Egypt">Ägypten</option><option value="Aland Islands">Åland</option><option value="Albania">Albanien</option><option value="Algeria">Algerien</option><option value="Virgin Islands (U.S.)">Amerikanische Jungferninseln</option><option value="US Minor Outlying Islands">Amerikanisch-Ozeanien (US Minor Outlying Islands)</option><option value="American Samoa">Amerikanisch-Samoa</option><option value="Andorra">Andorra</option><option value="Angola">Angola</option><option value="Anguilla">Anguilla</option><option value="Antarctica">Antarktis</option><option value="Antigua and Barbuda">Antigua und Barbuda</option><option value="Equatorial Guinea">Äquatorialguinea</option><option value="Argentina">Argentinien</option><option value="Armenia">Armenien</option><option value="Aruba">Aruba</option><option value="Azerbaijan">Aserbaidschan</option><option value="Ethiopia">Äthiopien</option><option value="Australia">Australien</option><option value="Bahamas">Bahamas</option><option value="Bahrain">Bahrain</option></select>

<button onClick='disablemulti()'>
disable multiple
</button>

CSS

/*======================================
  Selectric v1.11.0
======================================*/

.selectric-wrapper {
  position: relative;
  cursor: pointer;
}

.selectric-responsive {
  width: 100%;
}

.selectric {
  border: 1px solid #DDD;
  background: #F8F8F8;
  position: relative;
}

.selectric .label {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0 38px 0 10px;
  font-size: 12px;
  line-height: 38px;
  color: #444;
  height: 38px;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.selectric .button {
  display: block;
  position: absolute;
  right: 0;
  top: 0;
  width: 38px;
  height: 38px;
  color: #BBB;
  text-align: center;
  font: 0/0 a;
  *font: 20px/38px Lucida Sans Unicode, Arial Unicode MS, Arial;
}

.selectric .button:after {
  content: " ";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  width: 0;
  height: 0;
  border: 4px solid transparent;
  border-top-color: #BBB;
  border-bottom: none;
}

.selectric-focus .selectric {
  border-color: #aaaaaa;
}

.selectric-hover .selectric {
  border-color: #c4c4c4;
}

.selectric-hover .selectric .button {
  color: #a2a2a2;
}

.selectric-hover .selectric .button:after {
  border-top-color: #a2a2a2;
}

.selectric-open {
  z-index: 9999;
}

.selectric-open .selectric {
  border-color: #c4c4c4;
}

.selectric-open .selectric-items {
  display: block;
}

.selectric-disabled {
  filter: alpha(opacity=50);
  opacity: 0.5;
  cursor: default;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

.selectric-hide-select {
  position: relative;
  overflow: hidden;
  width: 0;
  height: 0;
}

.selectric-hide-select select {
  position: absolute;
  left: -100%;
}

.selectric-hide-select.selectric-is-native {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index:...

JavaScript

(function(factory) {

 disablemulti = function()
{
$('#Country').removeAttr('multiple');
$('#Country').selectric('destroy')
$('#Country').selectric('init')

}










  /* global define */
  /* istanbul ignore next */
  if ( typeof define === 'function' && define.amd ) {
    define(['jquery'], factory);
  } else if ( typeof module === 'object' && module.exports ) {
    // Node/CommonJS
    module.exports = function( root, jQuery ) {
      if ( jQuery === undefined ) {
        if ( typeof window !== 'undefined' ) {
          jQuery = require('jquery');
        } else {
          jQuery = require('jquery')(root);
        }
      }
      factory(jQuery);
      return jQuery;
    };
  } else {
    // Browser globals
    factory(jQuery);
  }
}(function($) {
  'use strict';

  var $doc = $(document);
  var $win = $(window);

  var pluginName = 'selectric';
  var classList = 'Input Items Open Disabled TempShow HideSelect Wrapper Focus Hover Responsive Above Scroll Group GroupLabel';
  var eventNamespaceSuffix = '.sl';

  var chars = ['a', 'e', 'i', 'o', 'u', 'n', 'c', 'y'];
  var diacritics = [
    /[\xE0-\xE5]/g, // a
    /[\xE8-\xEB]/g, // e
    /[\xEC-\xEF]/g, // i
    /[\xF2-\xF6]/g, // o
    /[\xF9-\xFC]/g, // u
    /[\xF1]/g,      // n
    /[\xE7]/g,      // c
    /[\xFD-\xFF]/g  // y
  ];

  /**
   * Create an instance of Selectric
   *
   * @constructor
   * @param {Node} element - The &lt;select&gt; element
   * @param {object}  opts - Options
   */
  var Selectric = function(element, opts) {
    var _this = this;

    _this.element = element;
    _this.$element = $(element);

    _this.state = {
      multiple       : !!_this.$element.attr('multiple'),
      enabled        : false,
      opened         : false,
      currValue      : -1,
      selectedIdx    : -1,
      highlightedIdx : -1
    };

    _this.eventTriggers = {
      open    : _this.open,
      close   : _this.close,
      destroy : _this.destroy,
      refresh : _this.refresh,
      init    :...