基于bootstrap实现多个下拉框同时搜索功能

<div class="btn-group col-sm-3 col-xs-6 util-btn-margin-bottom-5 quick-search"> 
       <!--快速查询-->
       <div class="input-group">
        <span class="input-group-addon"><i class="fa fa-search"></i></span>
        <select data-filter-type="2" name="copyfrom" class="form-control select2" data-validate="notempty" style="visibility: hidden;" data-field="name" data-placeholder="搜索数据资源">
         <option value="">请选择数据资源</option>
         <optgroup label="UNESCO二类中心">
          <#list data.copyfromList as entity>
          <#if (entity.type?? && entity.type == '1')>
          <option value="${entity.alias!}" <#if (param.copyfrom?? && param.copyfrom == entity.alias)>selected</#if>>${entity.alias!}</option>
          </#if>
          </#list>
         </optgroup>
         <optgroup label="科技动态与进展">
          <#list data.copyfromList as entity>
          <#if (entity.type?? && entity.type == '7')>
          <option value="${entity.alias!}" <#if (param.copyfrom?? && param.copyfrom == entity.alias)>selected</#if>>${entity.alias!}</option>
          </#if>
          </#list>
         </optgroup>
         <optgroup label="其他">
          <#list data.copyfromList as entity>
          <#if (entity.type?? && entity.type == '8')>
          <option value="${entity.alias!}" <#if (param.copyfrom?? && param.copyfrom == entity.alias)>selected</#if>>${entity.alias!}</option>
          </#if>
          </#list>
         </optgroup>
        </select>
       </div>
      </div>

<div class="btn-group col-sm-3 col-xs-6 util-btn-margin-bottom-5 quick-search"> 
       <!--快速查询-->
       <div class="input-group">
        <span class="input-group-addon"><i class="fa fa-search"></i></span>
        <select data-filter-type="2" name="cid" class="form-control select2" data-validate="notempty" style="visibility: hidden;" data-field="name" data-placeholder="搜索栏目名称">
         <option value=""></option>
         <#list data.categories as entity>
         <option value="${entity.id}" <#if (param.cid?? && param.cid == entity.id)>selected</#if>>${entity.id} - ${entity.name}</option>
         </#list>
        </select>
       </div>
      </div>

bindEvents:function(){
　　　　var self = this, dom = self.element;
　　　　$('select[name="copyfrom"]', dom).change(function(event){
　　　　self.params.copyfrom = $(this).val();
　　　　var url = self.formatParams(self.params);
　　　　window.location.href = "cekasp_article.htm" + url;
　　});

　　　　$('select[name="cid"]', dom).change(function(event){
　　　　self.params.cid = $(this).val();
　　　　var url = self.formatParams(self.params);
　　　　window.location.href = "cekasp_article.htm" + url;
　　});

 }

　　formatParams:function(params){
　　　　var self = this;
　　　　var url = "";
　　　　for(var param in params){
　　　　if(params[param]){
　　　　　　url += param + "=" + params[param] + "&";
　　　　}
　　}
　　　　if(url.length > 0){
　　　　　　url = "?" + url.substring(0,url.length-1);
　　}
　　　　return url;
　　}

  　String categoryId = request.optString("cid");
　　if (!ValidateUtil.isNull(categoryId)) {
　　// 加载栏目信息
  　　JSONObject jsonCategory = toJSONObject(adminService.loadById(CekaspCategory.class, categoryId));
　　　　response.put("category", jsonCategory);
　　　　param.addFilter("id", FilterType.IN, articleIdList, 1);

　　}

　　String copyfrom = request.optString("copyfrom");
　　if (!ValidateUtil.isNull(copyfrom)) {
　　　　param.addFilter("copyfrom", FilterType.EQUALS, copyfrom);

  }

 　List<CekaspArticle> articleList = adminService.list(CekaspArticle.class,param);