var checkStatus = table.checkStatus('dataTable'),data = checkStatus.data;
if(data.length < 1){
    layer.alert('请选择信息');
    return;
}
var ids = [];
for(var i=0;i<data.length;i++){
    ids += data[i].id+','
}
ids = ids.substr(0,ids.length-1);
console.log(ids);