使用方法：
1、head引入js文件
<script src="js/jquery.min.js"></script>
2、body引入HTML代码
<div>
<h5>单选</h5>
<select name="search" id="search" data-selector>
<option value="">请选择</option>
</select>
</div>
<div>
<h5>多选</h5>
<select name="searchs" id="searchs" data-selector data-selector-checks="true">
<option value="">请选择</option>
</select>
</div>
<script src="js/area.js"></script><!--所有城市数据-->
<script src="js/select.js"></script><!--默认调用方法-->
<script src="verSelector/verSelect.js"></script><!--封装插件-->
<script>
new verSelector(); //启动插件
</script>
3、设置单选和多选
select属性添加单选：data-selector
select属性添加多选：data-selector data-selector-checks="true"
