获取选中checkbox的value值

  <div class="modal fade" id="ggModal" tabindex="-1" role="dialog" aria-label-borderledby="myModallabel">
    <div class="modal-dialog" role="document" style="width:1060px;">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal" aria-label-border="Close"><span aria-hidden="true">×</span></button>
          <h4 class="modal-title" id="myModallabel-border">选择规格型号</h4>
        </div>
        <div class="modal-body">
          <div class="form-group">
            <div class="col-sm-2">
              <input type="checkbox" value="度数：38°" name="ggCheckbox" /><span>度数：38°</span>
            </div>
            <div class="col-sm-2">
              <input type="checkbox" value="产地：四川" name="ggCheckbox" /><span>产地：四川</span>
            </div>
            <div class="col-sm-2">
              <input type="checkbox" value="类型：醇香型" name="ggCheckbox" /><span>类型：醇香型</span>
            </div>
          </div>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
          <button type="button" class="btn btn-primary" id="subButton" onclick="selectGg()">保存</button>
        </div>
      </div>
    </div>
  </div>

    function selectGg() {
      obj = document.getElementsByName("ggCheckbox");
      check_val = [];
      for(k in obj) {
        if(obj[k].checked)
          check_val.push(obj[k].value);
      }
      $("#ggInput").val(check_val);
    }