Speed up page load times when running Google ads

Google ads are an easy way to monetize your site, but their implementation leaves a lot to be desired. To insert a Google ad block on a page one has to insert two script blocks: one to set the adverts parameters, and one to load the external Google script.

The problem is that the scripts have to be inserted in the body at the place where the advert is desired. This is because Google uses JavaScript's document.write to generate an iframe, which then loads the ad. If Google's servers are being a bit laggy then your visitor has to wait for the Google script to finish loading before the rest of the page is rendered. The closer your ad is to the top of the page, the worse the resulting problem is.

A number of solutions have been proposed, including overwriting the document.write method, and inserting the Google script through DOM manipulation. Unfortunately this breaks in Safari 2.0, and breaks any other instances of document.write you may be using.

So here is the solution we've come up with:

Normal set-up

<body>
	Content above advert
	<script type="text/javascript"><!--
		Google ad params
	//--></script>
	<script type="text/javascript" src="...show_ads.js"></script>
	Content below advert
</body>

Optimised set-up

<body>
	Content above advert
	<div id="ad1_inline"></div>
	Content below advert
	<div id="ad1_footer" style="display: none;">
		<script type="text/javascript"><!--
			Google ad params
		//--></script>
		<script type="text/javascript" src="...show_ads.js"></script>
	</div>
	<script type="text/javascript">
		window.onload = function() {
			document.getElementById('ad1_inline').appendChild(document.getElementById('ad1_footer'));
			document.getElementById('ad1_footer').style.display = '';
		}
	</script>
</body>

What it does

  1. Creates a place-holder div for the where the ad will end up
  2. Places all the ad code in an "footer div" at the bottom of the page - this prevents your page from "locking" while the Google scripts load
  3. Hides the footer "footer div" with css so the ads don't ever show below your page, causing the page height to "jump"
  4. Waits for the whole page to load before moving the ads (the window.onload bit) thus preventing Internet Explorer from getting really upset.
  5. Moves the ad to it's placeholder, and un-hides it

Of course you may not want to use window.onload. If you attach the function to an event you can modularise the whole ad insertion in your code. Using a JavaScript library (Prototype in this case, but others will look similar) results in the following change to the last script:

	...
	<script type="text/javascript">
		Event.observe(window, 'load', function() {
			$('ad1_inline').appendChild($('ad1_footer'));
			$('ad1_footer').show();
		}
	</script>
	...

All scripts are Public Domain.

Comments

online casino gambling casino online best online casino [url=https://onlinecasinoslotsparty.com/]betfair online casino[/url]

slots for real money online casino games usa online casino | [url=https://onlinecasinozeus24.com/]online casino real money[/url]

slots for real money online casino games usa online casino | [url=https://onlinecasinozeus24.com/]online casino real money[/url]

casino real money casino real money usa online casino | [url=https://onlinecasinozeus24.com/]best online casinos[/url]

casino bonus slots for real money online casino slots [url=https://casinoslotsy.us.org/]usa online casino[/url]

casino bonus slots for real money online casino slots [url=https://casinoslotsy.us.org/]usa online casino[/url]

online casinos best online casinos online casino gambling [url=https://onlinecasinog24.com/]play casino[/url]

free online casino slots usa online casino gsn casino [url=https://onlinecasinolo.com/]mgm online casino[/url]

online casinos for us players real money casino real money casino [url=https://onlinecasinog24.com/]casino play[/url]

online casino games online casino games online casino [url=https://casinoslotssy.us.org/]casino blackjack[/url]

online casino games online casino games online casino [url=https://casinoslotssy.us.org/]casino blackjack[/url]

casino real money online casino games gsn casino [url=https://casinoslotssy.us.org/]casino online[/url]

casino real money online casino games gsn casino [url=https://casinoslotssy.us.org/]casino online[/url]

gsn casino games casino slots online casino gambling [url=https://onlinecasinolo.com/]gsn casino[/url]

casino play online gambling casino best online casinos | [url=https://onlinecasinowus.com/]online casino gambling[/url]

gambling sites online casinos for us players casino slots [url=https://onlinecasinorealmoney.us.org/]online casino games[/url]

usa online casino online casino usa online casino [url=https://onlinecasinoster.us.org/]online casino gambling[/url]

betfair online casino online gambling casino casino play [url=https://onlinecasinorealmoney.us.org/]casino slots[/url]

casino games betfair online casino gsn casino games | [url=https://onlinecasinowus.com/]casino real money[/url]

casino games betfair online casino gsn casino games | [url=https://onlinecasinowus.com/]casino real money[/url]

gambling sites mgm online casino online casino [url=https://onlinecasinoster.us.org/]bovada casino[/url]

online casinos free online casino slots online casino gambling | [url=https://onlinecasinowus.com/]betfair online casino[/url]

online casinos free online casino slots online casino gambling | [url=https://onlinecasinowus.com/]betfair online casino[/url]

best online casino online casinos casino bonus [url=https://onlinecasinorealmoney.us.org/]online casino gambling[/url]

best online casino online casinos casino bonus [url=https://onlinecasinorealmoney.us.org/]online casino gambling[/url]

online casino gambling free online casino slots online casinos [url=https://onlinecasinoster.us.org/]gsn casino[/url]

online casino real money casino games gsn casino [url=https://onlinecasinorealmoney.us.org/]betfair online casino[/url]

online casino real money casino games gsn casino [url=https://onlinecasinorealmoney.us.org/]betfair online casino[/url]

gsn casino games casino real money casino play | [url=https://onlinecasinowus.com/]online casinos[/url]

gsn casino games casino real money casino play | [url=https://onlinecasinowus.com/]online casinos[/url]

real money casino casino bonus online casino bonus [url=https://onlinecasinoster.us.org/]gambling sites[/url]

gsn casino slots real money casino online casino gambling | [url=https://onlinecasinowus.com/]casino blackjack[/url]

casino online online casino slots mgm online casino [url=https://onlinecasinorealmoney.us.org/]online casino slots[/url]

casino online online casino slots mgm online casino [url=https://onlinecasinorealmoney.us.org/]online casino slots[/url]

mgm online casino free online casino slots casino slots [url=https://onlinecasinoster.us.org/]play casino[/url]

mgm online casino free online casino slots casino slots [url=https://onlinecasinoster.us.org/]play casino[/url]

casino online online casino slots best online casinos | [url=https://onlinecasinowus.com/]online casino real money[/url]

casino online bovada casino casino play | [url=https://onlinecasinowus.com/]mgm online casino[/url]

casino online bovada casino casino play | [url=https://onlinecasinowus.com/]mgm online casino[/url]

bovada casino casino online online gambling | [url=https://onlinecasinowus.com/]casino play[/url]

online casino games online casinos for us players online gambling | [url=https://onlinecasinowus.com/]online casino games[/url]

online casino games online casinos for us players online gambling | [url=https://onlinecasinowus.com/]online casino games[/url]

casino play online casino games gsn casino games | [url=https://onlinecasinowus.com/]online casino gambling[/url]

casino play online casino games gsn casino games | [url=https://onlinecasinowus.com/]online casino gambling[/url]

online gambling casino casino real money casino bonus | [url=https://onlinecasinowus.com/]usa online casino[/url]

online gambling casino casino real money casino bonus | [url=https://onlinecasinowus.com/]usa online casino[/url]

casino blackjack online casino gsn casino [url=https://onlinecasinog24.com/]mgm online casino[/url]

online casino bonus online casino casino play [url=https://onlinecasinogamesnt.us.org/]gsn casino games[/url]

mgm online casino online casino betfair online casino [url=https://onlinecasinogamestt.us.org/]best online casino[/url]

casino play best online casino online casino real money [url=https://onlinecasinolo.com/]gsn casino[/url]

Pages

Add new comment