checkbox

<div class="form-group">
    <label class="col-sm-2 control-label">发布系统:</label>
    <div  class="col-sm-10">
        <input type="hidden" id="fbxt" name="fbxt" value="${news.fbxt}">
        <input type="checkbox" name="checkxt" id="checkbox-3-3" value="1" onclick="getCheck('fbxt')"/><label
            for="checkbox-3-3"><span>触摸屏</span></label>
        <input type="checkbox" name="checkxt" id="checkbox-3-4" value="2" onclick="getCheck('fbxt')"/><label
            for="checkbox-3-4"><span>公众服务网</span></label>
        <input type="checkbox" name="checkxt" id="checkbox-3-5" value="3" onclick="getCheck('fbxt')"/><label
            for="checkbox-3-5"><span>androidAPP</span></label>
        <input type="checkbox" name="checkxt" id="checkbox-3-6" value="4" onclick="getCheck('fbxt')"/><label
            for="checkbox-3-6"><span>IOSapp</span></label>
    </div>
</div>

<script>
    function getCheck(fbxt) {
        var str="";
      $("input[name='checkxt']:checked").each(function () {
          if(str == ""){
              str+=$(this).val()
          }else{
              str+=","+$(this).val()
              console.log(2222222)
          }
      })
     console.log(str)

    }
</script>