let imgUrlArr = []
let fn = (list) => {
  for (let k in list) {
    if (k === 'imgurl') {
      imgUrlArr.push(list[k])
    }
    let type = Object.prototype.toString.call(list[k])
    if (type === '[object Object]'||type ==='[object Array]') {
      fn(list[k])
    }
  }
}
fn(data)
document.getElementById('box').innerHTML=imgUrlArr