Lazy loading applied to a web page is an excellent technique when all contents aren't immediately visible and you want to speed up page rendering.
A perfect candidate for this method are image galleries with many items, only the first image is visible when the page loads, other images will be visible only if the user decides to browse them.
This technique sounds great, but has a big SEO problem: search engine crawlers does not execute scripts, they only analyze HTML markup, so all the code that renders images dynamically is totally ignored along with images and captions.

Here're four solutions and, as often happens, the best is the last one.

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In this article we're going to talk about content lockers, I'll give you the know-how to create one yourself and at the end you'll have the chance to download the JavaScript/jQuery sources and implement it rapidly.

Content lockers were born as an annoying tool for web marketing affiliations: in a nutshell, if you have a blog followed by a large audience, a franchisor might pay you to partially block contents until the reader performs an action, for example compiling a survey or subscribing to a business newsletter. It 'a hateful practice, but generates discete income for many bloggers.

What I propose you is a soft social media content locker, to use with caution and wisdom.

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Social interaction of your customers are very important to analyze their impact on your conversions.
Reading the official Google Analytics developers guide, the solution seems easy but unfortunately the code doesn't work if you are correctly loading the Facebook SDK asynchronously, that's because may be the the SDK is still loading when you subscribe to the event.

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Have you changed your domain and don't want to loose your SEO page rankings?
Do you have renamed a page and don't want to return errors to users that have saved a bookmark?
You have to perform a 301 permanent redirect to the new page/site.

There are plenty of methods to perform this, if you Google the question you'll be submerged by the answers.
Curiously the easiest method doesn't come out first.

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We've already seen in a previous article how to manage JavaScript events.
jQuery simplifies but most of all uniforms the JavaScript events engine with 2 simple methods: bind() for events subscription and trigger() to fire them.

Events are not only a prerogative of standard DOM (Document Object Model) objects, your custom objects can throw events too, event if they aren't DOM objects.

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