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I am getting this error with my code "Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened."

I am trying to load every 25 seconds new ad banner from third site. 

mFl(); function mFl() { if (document.getElementsByClassName('adposition').length > 0) { loadMe("adposition","http://third.tld/b?z=1&u=a&width=728&height=90"); } setTimeout(mFl, 25000); } function loadMe(className, scriptName) { var docHeadObj = document.getElementsByClassName( className )[0]; docHeadObj.innerHTML = ""; var ttt = Math.floor(Date.now() / 1000); var dynamicScript = document.createElement("script"); dynamicScript.type = "text/javascript"; dynamicScript.src = scriptName+ "&uunique=" + ttt; docHeadObj.appendChild(dynamicScript); }

Any workaround for this please?

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Try using https://github.com/krux/postscribe plugin. As it mentioned in the repo.

Remote scripts, especially ads, block the page from doing anything else while they load. They contribute a large % to load times which affects your bottom line. Asynchronous ads do not block the page and can be delivered after core content - Async FTW.

Why is it so hard to deliver ads asynchronously? Because they may contain calls to document.write, which expects to be handled synchronously. PostScribe lets you deliver a synchronous ad asynchronously without modifying the ad code.

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