google ads iframe.js

window.addEventListener("blur",function(){
  window.setTimeout(function(){ 
    var outerIframe = document.activeElement;
    if (! outerIframe instanceof HTMLIFrameElement) { console.log("fail 1");return }
    if (outerIframe.id.match("google_ads") == null) { console.log("fail 2");return }
    
    var innerDoc = outerIframe.contentWindow 
      ? outerIframe.contentWindow.document 
      : frameRef.contentDocument;
    
    var innerIframe = innerDoc.getElementsByTagName('iframe')[0];
    if (innerIframe == null) { console.log("fail 3");return }
    var innerSrc = innerIframe.getAttribute('src');
    if (innerSrc == null) { console.log("fail 4");return }
    var clickURL = getParameterArrayByName("click_url",innerSrc);
    if (clickURL == null) { console.log("fail 5");return }
    console.log("fetching tracking URL: "+clickURL);
    fetch(clickURL);
  },0);
});