fuckkindle.js

f = (i)=>{
  var q = '#contentTabList_'+String(i)+'_myx > div > div > div > div > div.myx-fixed-left-grid-col.myx-col-left > div > div.myx-column.myx-span7.myx-span-last > div > a > span > button > span'
  document.querySelector(q).click();
  setTimeout(()=>{
    document.querySelector('#contentAction_download_myx > div > div > div > div > div > div > span').click()
    setTimeout(()=>{
      document.querySelector('#dialogButton_ok_myx > span > button > span').click()
    },1000);
  }, 1000);
}

f2 = (i)=>{
  console.log(i);
  f(i);
  if(i <= 70){
    setTimeout(()=>{
      f2(i+1);
    }, 50000);
  }
}

f2(1);