Jquery和CSS实现选择框重置按钮功能

<select>
 <option value="">select a color..</option>
 <option value="red">red</option>
 <option value="green">green</option>
 <option value="blue">blue</option>
</select>
<div class="displayselect">
 <span class="value"></span>
 <span class="close">⊗</span>
 </div>

.displayselect{
 display:none;
 border: 1px solid;
 }
 select, .displayselect {
 text-indent:20px;
 font-family:helvetica;
 }
 select, .displayselect{
 font-size:22px;
 height:50px;
 line-height:50px;
 width:100%;
 text-transform:capitalize;
 }
 .displayselect .close{
 display:block;
 float:right;
 width:10%;
 text-align:center;
 font-size:52px;
 cursor:pointer;
 }

var select  = $('select');
var selectresults = $('.displayselect');
var selectvalue = $('.value', selectresults);
var selectclose = $('.close', selectresults);
select.on('change', function() {
 $(this).add(selectresults).toggle();
 selectvalue.html(this.value);
 });
 selectclose.click(function(){
 select.val('').fadein();
 selectresults.toggle();
 selectvalue.html('');
 });