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POImage Rollover, no Javascript, no Link, pure CSS, code validate and Broswer compatible
 

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    <p>Image Rollover, no JavaScript, no Link, pure CSS, code validate and Browser compatible.</p> <p>Hello all, I have been working 24hours strait to come up with this fairly easy solution. I want to know if everything is all right and if there are ways to improve. It's quite elegant, here we go:</p> <p>I have only one image "Logo" but it will show as 2 different logo each with a rollover effect. I use a sprite (only 1 image containing my 4 logos) and I just change it's position.</p> <p>Here I insert my image in a div with</p> <pre><code>&lt;div id="logo-rollover-1" class="logo-rollover"&gt; &lt;img title="whatever" alt="whatever" src="path-to-your-image"&gt; &lt;/div&gt; </code></pre> <p>Then I insert in another div the same image but with a different id</p> <pre><code>&lt;div id="logo-rollover-2" class="logo-rollover"&gt; &lt;img title="whatever" alt="whatever" src="path-to-your-image"&gt; &lt;/div&gt; </code></pre> <p>Now my CSS:</p> <pre><code>.logo-rollover { background: #ffd42a url('path-to-your-image'); width: 230px; float: left; height: 130px; overflow: hidden; position: relative; } .logo-rollover img { width: 460px; height: 260px; } .logo-rollover :hover { opacity: 0; filter:alpha(opacity=0); } #logo-rollover-1 { background-position: 0px -130px; } #logo-rollover-2 { background-position: -230px -130px; } #logo-rollover-2 img { right: 230px; position: relative; display: block; } </code></pre> <p>Explanations: when someone hover an image it becomes transparent and show the background witch is the same image but with a different position. opacity: 0 for Firefox, Google and filter:alpha(opacity=0) for Explorer. position: relative on the .logo-rollover class is for compatibility of hidden overflow with IE6 &amp; IE7. display:block; is added to the id img for the Opera browser.</p> <p><strong>No Hack:</strong> When there is no link, there is no need for href="#" or "javascript:void(0)"</p> <p>Advantages: instead of requesting 4 (or more) images, there is only 1 image (the total size of 1 image sprite is smaller then the total size of 4). the rollover is instant as the image is already downloaded. No hack, no false link, code validate. Add a title to the image. The only browser not rolling over is IE6 but the site is not broken, the logo show correctly. There is a hack for activating hover for IE6 but I didn't bother as IE6 is dead.</p> <p>Tip: use the same path for your image everywhere. I mean the "path-to-your-image" needs to be the same for all call. Because of browser caching.</p> <p>Is this the best elegant way? Can this code be improve? I hope it will help someone because it was a real pain to develop thank to others user here I found some tricks here and there and came up with this.</p> <p>Comment appreciated.</p>
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    1. COI think you should probably post this in http://codereview.stackexchange.com/ -- That said, I feel like you are using the best approach. Be sure to add alt text to Logo.
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    2. COYes, I had put complete code but was not allowed in this post... I edited it and yes it has alt text. thank's
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    3. CO[...for future reference, we have a site for this.](http://codereview.stackexchange.com)
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