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    copied!<p>@apaul34208 pretty much hit the nail on the head there... I created an example for you based on the same principle so you can see it working.</p> <p><strong>HTML:</strong></p> <pre><code>&lt;header id="masthead" class="site-header" role="banner"&gt; &lt;div class="randomheader"&gt; &lt;div class="image"&gt;&lt;img src="" /&gt;&lt;/div&gt; &lt;span class="caption"&gt;&lt;/span&gt; &lt;/div&gt; &lt;nav id="site-navigation" class="main-navigation" role="navigation"&gt; nav here &lt;/nav&gt; &lt;/header&gt; </code></pre> <p><strong>CSS:</strong></p> <pre><code>.randomheader .image { position: relative; height: 0; /* This percentage needs to be calculated using the aspect ratio of your image. Type your image width and height in this tool to get the aspect ration of your image: http://andrew.hedges.name/experiments/aspect_ratio/ In this example the Google logo was 55:19 and to get the percentage you divide 19 by 55 = 0.3454 */ padding-bottom: 34.54%; } .randomheader img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } .randomheader .caption { display: block; min-height: 1em; } .randomheader img, .randomheader .caption { opacity: 0; } </code></pre> <p><strong>jQuery:</strong></p> <pre><code>(function($) { $.fn.extend({ randomImage: function(config) { var defaults = {}, config = $.extend({}, defaults, config); return this.each(function() { var randNum = Math.floor(Math.random()*config.myImages.length), image = config.myImages[randNum], caption = config.myCaptions[randNum], path = config.path + image, $container = $(this), $image = $container.find('img'), $caption = $container.find('.caption'); // preload image before adding // to DOM and fading it in $image.attr({ src: path, alt: image }).load(function() { $caption.html(caption); $image.add($caption).animate({ opacity: 1 }, 'slow'); }); }); } }); }(jQuery)); // on DOM ready, // start 'er up jQuery(function($) { $('.randomheader').randomImage({ myImages: ['logo4w.png'], myCaptions: ['Google logo'], path: 'https://www.google.co.uk/images/srpr/' }); }); </code></pre> <p><strong><a href="http://jsfiddle.net/setEG/2/" rel="noreferrer">JSFiddle Demo</a></strong></p>
 

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