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copied!<p>I can't tell you how responsive this will be with a 100 divs, but based on the earlier script here's something to get you at least started — <a href="http://jsfiddle.net/jgJsL/5/" rel="noreferrer">http://jsfiddle.net/jgJsL/5/</a>:</p> <pre><code>$.fn.bounce = function(options) { var settings = $.extend({ speed: 10 }, options); return $(this).each(function() { var $this = $(this), $parent = $this.parent(), height = $parent.height(), width = $parent.width(), top = Math.floor(Math.random() * (height / 2)) + height / 4, left = Math.floor(Math.random() * (width / 2)) + width / 4, vectorX = settings.speed * (Math.random() > 0.5 ? 1 : -1), vectorY = settings.speed * (Math.random() > 0.5 ? 1 : -1); // place initialy in a random location $this.css({ 'top': top, 'left': left }).data('vector', { 'x': vectorX, 'y': vectorY }); var move = function($e) { var offset = $e.offset(), width = $e.width(), height = $e.height(), vector = $e.data('vector'), $parent = $e.parent(); if (offset.left <= 0 && vector.x < 0) { vector.x = -1 * vector.x; } if ((offset.left + width) >= $parent.width()) { vector.x = -1 * vector.x; } if (offset.top <= 0 && vector.y < 0) { vector.y = -1 * vector.y; } if ((offset.top + height) >= $parent.height()) { vector.y = -1 * vector.y; } $e.css({ 'top': offset.top + vector.y + 'px', 'left': offset.left + vector.x + 'px' }).data('vector', { 'x': vector.x, 'y': vector.y }); setTimeout(function() { move($e); }, 50); }; move($this); }); }; $(function() { $('#wrapper li').bounce({ 'speed': 7 }); }); </code></pre>

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