There's no handy css or js property you can hook into do validate that, but there is a js event.
The images if they don't download properly will throw an "error" event (onerror),
You would have to hook
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Foreword (July, 2015)
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In this tutorial viewers will learn how add a scalable full-width header using CSS3.
Create a new HTML document with an internal stylesheet. Set a tiled background.: Create a new div and name it Header. Position it with position:absolute at the top…
In this tutorial viewers will learn how to code links for mobile sites that, once clicked, send a call or text to a specified number.
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