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    <blockquote> <p><strong>Requirements</strong></p> <ul> <li>boxes are hidden until whole page loads</li> <li>boxes are set to random positions around browser view port</li> <li>boxes need to animate to their proper positions</li> </ul> </blockquote> <p>You can store the original position and after your random placement start animating them to go back to their starting position. I also cached any DOM reference which were repeated to speed up the code execution (most likely not noticeably but it's good practice)</p> <h3><a href="http://jsfiddle.net/az2SL/" rel="nofollow">DEMO</a> - Boxes placed at random and then animated back to their proper positions.</h3> <p>I have separated the 2 actions, placing the boxes at random locations using your original code but now also storing the original position in associated data using <a href="http://api.jquery.com/data/" rel="nofollow"><strong>jQuery's Data</strong></a> which is then used to animate them back to their proper positions.</p> <p>You can now randomise and re-set the boxes on demand by calling either method:</p> <pre><code>$(document).ready(function() { var h = $(window).height(); var w = $(window).width(); var $allBoxes = $('#intro .box'); placeBoxesRandomly($allBoxes, h, w); placeBoxesToDataStorePositions($allBoxes); });​ </code></pre> <p><code>placeBoxesRandomly</code> still does what it did before except it now also associates the original starting position data with the elements:</p> <pre><code>function placeBoxesRandomly($boxes, h, w) { $boxes.each(function() { var $box = $(this); var position = $box.position(); tLeft = w - Math.floor(Math.random() * 900), tTop = h - Math.floor(Math.random() * 900); $box.css({ "left": tLeft, "top": tTop }); $box.data("start-position-left", position.left); $box.data("start-position-top", position.top); }); } </code></pre> <p><code>placeBoxesToDataStorePositions</code> places the boxes to the positions stored in the associated data.</p> <pre><code>function placeBoxesToDataStorePositions($boxes) { $boxes.each(function() { var $box = $(this); $box.animate({ "left": $box.data("start-position-left"), "top": $box.data("start-position-top") }, 3000); }); } </code></pre>
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