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    <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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    1. COThanks for the work, but for some reason, this still breaks my responsive design. Is there a way to preload a blank 1000x250 px image in the jquery function and then fade in the random image? Ugly, yes, but that is one way to keep the responsive design. –
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    2. COShouldn't .randomheader img height be 'auto' there? And @songdogtech why preload the blank image via jquery? Can't you just include it in your html as style="opacity: 0" and just replace the image, then fade it in with animate?
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    3. CO@songdogtech - If you're going to use a blank image then the above isn't necessary and I'd create your image as small as it can be while maintaining the aspect ratio of the images you will be loading in (to help with performance). So if your image is 958px by 718px that's a 4:3 aspect ratio so your blank image can be 4px by 3px. Then you just set it's width to be 100% and height to auto in CSS. Hope this helps.
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