获取layui多选框选中的ID

HTMl

<div class="layui-btn-group demoTable">
    <button class="layui-btn" data-type="getCheckData">获取选中的ID</button>
</div>

JS

getCheckData: function(){ 
	//获取选中数据
    var checkStatus = table.checkStatus('testReload')
        ,data = checkStatus.data 
        ,arr_id = new Array();
    for(var i = 0;i<data.length;i++){
        arr_id.push(data[i].id);
    }
 console.log(arr_type)