Bootstrap Selectpicker

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.6.3/js/bootstrap-select.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.6.3/css/bootstrap-select.min.css">
<select id="compare" class="selectpicker" data-style="btn-success" title="Compare Settings" data-live-search="true">
              
            <option value="">---</option><option value="AF">Afghanistan</option><option value="AL">Albanien</option><option value="DZ">Algerien</option><option value="AD">Andorra</option><option value="AO">Angola</option><option value="AQ">Antarktis</option><option value="AG">Antigua und Barbuda</option><option value="AR">Argentinien</option><option value="AM">Armenien</option><option value="AZ">Aserbaidschan</option><option value="AU">Australien</option><option value="BS">Bahamas</option><option value="BH">Bahrain</option><option value="BD">Bangladesch</option><option value="BB">Barbados</option><option value="BY">Belarus</option><option value="BE">Belgien</option><option value="BZ">Belize</option><option value="BJ">Benin</option><option value="BM">Bermuda</option><option value="BT">Bhutan</option><option value="BO">Bolivien</option><option value="BA">Bosnien und Herzegowina</option><option value="BW">Botswana</option><option value="BR">Brasilien</option><option value="VG">Britische Jungferninseln</option><option value="BN">Brunei Darussalam</option><option value="BG">Bulgarien</option><option value="BF">Burkina Faso</option><option value="BI">Burundi</option><option value="CL">Chile</option><option value="CN">China, Volksrepublik</option><option value="CR">Costa Rica</option><option value="HR">Croatia</option><option value="CI">Côte d’Ivoire&nbsp;(Elfenbeinküste)</option><option value="DE">Deutschland</option><option value="DM">Dominica</option><option value="DO">Dominikanische...

JavaScript

/*!
 * Bootstrap-select v1.5.4 (http://silviomoreto.github.io/bootstrap-select/)
 *
 * Copyright 2013-2014 bootstrap-select
 * Licensed under MIT (https://github.com/silviomoreto/bootstrap-select/blob/master/README.md#copyright-and-license)
 */
!function(a){"use strict";a.expr[":"].icontains=function(b,c,d){return a(b).text().toUpperCase().indexOf(d[3].toUpperCase())>=0};var b=function(c,d,e){e&&(e.stopPropagation(),e.preventDefault()),this.$element=a(c),this.$newElement=null,this.$button=null,this.$menu=null,this.$lis=null,this.options=d,null===this.options.title&&(this.options.title=this.$element.attr("title")),this.val=b.prototype.val,this.render=b.prototype.render,this.refresh=b.prototype.refresh,this.setStyle=b.prototype.setStyle,this.selectAll=b.prototype.selectAll,this.deselectAll=b.prototype.deselectAll,this.destroy=b.prototype.destroy,this.show=b.prototype.show,this.hide=b.prototype.hide,this.init()};b.prototype={constructor:b,init:function(){var b=this,c=this.$element.attr("id");this.$element.hide(),this.multiple=this.$element.prop("multiple"),this.autofocus=this.$element.prop("autofocus"),this.$newElement=this.createView(),this.$element.after(this.$newElement),this.$menu=this.$newElement.find("> .dropdown-menu"),this.$button=this.$newElement.find("> button"),this.$searchbox=this.$newElement.find("input"),void 0!==c&&(this.$button.attr("data-id",c),a('label[for="'+c+'"]').click(function(a){a.preventDefault(),b.$button.focus()})),this.checkDisabled(),this.clickListener(),this.options.liveSearch&&this.liveSearchListener(),this.render(),this.liHeight(),this.setStyle(),this.setWidth(),this.options.container&&this.selectPosition(),this.$menu.data("this",this),this.$newElement.data("this",this),this.options.mobile&&this.mobile()},createDropdown:function(){var b=this.multiple?" show-tick":"",c=this.$element.parent().hasClass("input-group")?" input-group-btn":"",d=this.autofocus?" autofocus":"",e=this.options.header?'<div class="popover-title"><button...