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    <p><strong>EDIT</strong>: as required by the OP, I've updated the example code to introduce a correction factor, required to change the diagonal movement direction and degree.</p> <p>If you want to use jQuery you'll have to download the <a href="https://github.com/brandonaaron/jquery-mousewheel" rel="nofollow">MouseWheel</a> plugin.</p> <p>Then, you can write a simple function binded to the <code>mousewheel</code> event, such as:</p> <p><strong>HTML</strong></p> <pre><code>&lt;div id="block"&gt;&lt;/div&gt; </code></pre> <p><strong>CSS</strong></p> <pre><code>#block { position: absolute; width: 200px; height: 150px; top: 200px; left: 50px; background-color: red; } </code></pre> <p><strong>Alternative 1: JS using CSS top and left</strong></p> <pre><code>$(function(){ $(window).on('mousewheel', function(evt,delta){ var $block = $('#block'), // retrieves the top and left coordinates top = parseInt($block.css('top')), left = parseInt($block.css('left')), // mouse wheel delta is inverted respect to the direction, so we need to // normalize it against the direction offset = -1 * delta, // X and Y factors allows to change the diagonal movement direction and // degree. Negative values inverts the direction. factorX = 5, factorY = 2, // calculates the new position. NOTE: if integers only are used for factors, // then `Math.floor()` isn't required. newTop = top + Math.floor(offset * factorY), newLeft = left - Math.floor(offset * factorX); // moves the block $block.css({ top: newTop + 'px', left: newLeft + 'px' }); }); }); </code></pre> <p><strong>Alternative 2: JS using offset()</strong></p> <pre><code>$(function(){ $(window).on('mousewheel', function(evt,delta){ var $block = $('#block'), // retrieves the top and left coordinates position = $block.offset(), // mouse wheel delta is inverted respect to the direction, so we need to // normalize it against the direction offset = -1 * delta, // X and Y factors allows to change the diagonal movement direction and // degree. Negative values inverts the direction. factorX = 5, factorY = 2, // calculates the new position. NOTE: if integers only are used for factors, // then `Math.floor()` isn't required. newTop = position.top + Math.floor(offset * factorY), newLeft = position.left - Math.floor(offset * factorX); // moves the block $block.offset({ top: newTop, left: newLeft }); }); }); </code></pre> <p>Now you can move the box up&amp;right by scrolling up and vice-versa by scrolling down. In this example, on every <code>mousewheel</code> event, the callback function:</p> <ol> <li>retrieves the current element position (<code>top</code> and <code>left</code> CSS properties)</li> <li>inverts the delta value returned by the <code>mousewheel</code> event, so that scrolling up we have a negative delta, and scrolling down we have a positive delta</li> <li>set the factor values required to define diagonal movement direction and degree</li> <li>calculates the new position</li> <li>moves the object.</li> </ol> <p>To change degree and direction, just change <code>factorX</code> and/or <code>factorY</code> values, so that:</p> <ul> <li>negative values inverts the direction, and</li> <li>different values change the degree (for example, X = 2 and Y = 5 makes the element moving with a much more closed angle, respect to X = 5 and Y = 2).</li> </ul> <p>Here's a <a href="http://jsfiddle.net/ragnarokkr/Ntxud/" rel="nofollow">demo</a> you can test.</p> <p><strong>Alternative 3: JS using cos() and sin()</strong></p> <pre><code>$(function(){ $(window).on('mousewheel', function(evt,delta){ var $block = $('#block'), // read current block position position = $block.offset(), // inverts the delta; scroll up == -1 - scroll down == +1 direction = -1 * delta, // sets the angle and converts it in radians angle = 45 * Math.PI / 180, // set displacememt factor factorX = Math.cos(angle) * direction, factorY = Math.sin(angle) * direction, // calculate the new position newTop = position.top + factorY, newLeft = position.left - factorX; // moves the block $block.offset({ top: newTop, left: newLeft }); }); }); </code></pre> <p>In this example, what to change is the value in <code>angle</code> (45 in this example). Everything else works just like the others examples.</p> <p>Last thing, if it's required to change the <em>velocity</em> of the movement, just multiply <code>factorX</code> and/or <code>factorY</code> by the wanted coefficient (for example, 1.5 for one and half time of the velocity, or 2 for twice the velocity, etc.).</p> <p>It's possibile to try it in a <a href="http://jsfiddle.net/ragnarokkr/4ptTx/" rel="nofollow">demo</a>.</p> <hr> <p><strong>EDIT</strong></p> <p>Just for the sake of knowledge, you can reach the same goal using <a href="https://developer.mozilla.org/en-US/docs/CSS/transform" rel="nofollow">CSS Transform</a>. This allows you to take advantage from GPU accelerated hardware. (Further informations can be found in the article of <a href="http://mobile.smashingmagazine.com/2012/06/21/play-with-hardware-accelerated-css/" rel="nofollow">Smashing Magazine</a> and <a href="http://paulirish.com/2012/why-moving-elements-with-translate-is-better-than-posabs-topleft/" rel="nofollow">Paul Irish</a>).</p> <p><strong>HTML</strong></p> <pre><code>&lt;div id="block"&gt;&lt;/div&gt; </code></pre> <p><strong>CSS</strong></p> <pre><code>#block { width: 200px; height: 150px; background-color: red; transform: translate3d(0, 0, 0); } </code></pre> <p><strong>JS</strong></p> <pre><code>$(function(){ var blockOffsetX = 50, blockOffsetY = 200; $('#block').css({ transform: 'translate3d(' + blockOffsetX + 'px' + ', ' + blockOffsetY + 'px, 0)' }); $(window).on('mousewheel', function(evt,delta){ var $block = $('#block'), offset = -1 * delta; factorX = 5, factorY = 2; blockOffsetX -= offset * factorX; blockOffsetY += offset * factorY; $block.css({ transform: 'translate3d(' + blockOffsetX + 'px, ' + blockOffsetY + 'px, 0)' }); }); }); </code></pre> <p>However, as you can see in this example, you'll need to keep track of the element X,Y position, because it's a little bit complicated to retrieve these values directly from the CSS. Moreover, this example is kept easier, but in production you'll have to support every vendor specific CSS property (<code>-webkit-</code>, <code>-moz-</code>, <code>-o-</code>, <code>-ms-</code>, etc.).</p> <p>Here's a working <a href="http://jsfiddle.net/ragnarokkr/JBDSG/" rel="nofollow">demo</a> (if it doesn't work, you probably will have to edit the code according to the specific prefixed CSS property for your browser).</p> <hr> <p><strong>EDIT</strong>: Since the OP has seen that listening to the <code>scroll</code> event it was the better choice for him, I've added the relative code (<em>only the JS code is reported here, since HTML and CSS are pretty the same as the first example</em>):</p> <pre><code>$(function(){ var lastScrollYPos = 0; $(window).on('scroll', function(){ var $this = $(this), $block = $('#block'), // retrieves the top and left coordinates position = $block.offset(), // X and Y factors allows to change the diagonal movement direction and // degree. Negative values inverts the direction. factorX = 1, factorY = 1, // retrieves current vertical scrolling position and calculate the // relative offset scrollYPos = $this.scrollTop(), offset = Math.abs(scrollYPos - lastScrollYPos), // mouse wheel delta is inverted respect to the direction, so we need to // normalize it against the direction direction = scrollYPos &gt; lastScrollYPos ? -1 : 1, // calculates the new position. NOTE: if integers only are used for factors, // then `Math.floor()` isn't required. newTop = position.top + Math.floor(direction * offset * factorY), newLeft = position.left - Math.floor(direction * offset * factorX); // moves the block $block.offset({ top: newTop, left: newLeft }); lastScrollYPos = scrollYPos; }); }); </code></pre> <p>Here's a working <a href="http://jsfiddle.net/ragnarokkr/JjxPM/" rel="nofollow">demo</a>.</p> <hr> <p><strong>BONUS: IDEA</strong></p> <p>Instead of use common local variables for every element, HTML5 <code>data-*</code> properties could be used to store element's data (for example: correction factor, last position, etc.), then jQuery <code>.data()</code> method could be used to retrieve these data and process them.</p> <p>PRO:</p> <ul> <li>Decouple the callback function from the element</li> <li>Customize every element on the page to act differently from each other</li> </ul> <p>CONS:</p> <ul> <li>It will probably affect the rendering performance in some way, especially whether many elements have to be managed at same time by the callback function.</li> </ul>
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    1. COthank you for your detailed answer. i will test it, as soon im from the work! i appreciate this very much, i will let you know how it worked for me!
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    2. COit seems to me that the diagonal line is always the same? how can i reduce the degree how the block is scrolled to. you know what i mean? thanks
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    3. COdiagonal line is the same because mousewheel event returns always +1 or -1 delta. Changing the diagonal angle requires you introduce a factor value in top (or Y) and/or left (or X) properties, that increase or decrement the amount of the offset value.
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