window.addEventListener('load', function() {
  let url = new URL(window.location.href);
  let params = url.searchParams.toString();

  var xhr = new XMLHttpRequest();
  xhr.open('GET', 'https://www.atarundesu.com/widget?' + params);
  xhr.onload = function(){
    widget = xhr.responseText;

    var link = document.getElementById('widget');
    link.style.display = 'none';

    // iframeを生成
    var iframe = document.createElement('iframe');
    iframe.scrolling = 'no';
    iframe.frameBorder = 0;
    iframe.marginWidth = 0;
    iframe.marginHeight = 0;
    iframe.width = '100%';
    iframe.height = '400px';

    // iframeにウィジェットを表示
    link.parentNode.insertBefore(iframe, link);
    iframe.contentWindow.document.write(widget);
  }
  xhr.send();
});