Pour référence, voici le div
qui compose le logo en question:
<div id="lga">
<style>
#hplogo{height:190px;margin-top:-5px;overflow:hidden;position:relative;width:714px;}#hplogo,
#hplogo
*{-webkit-user-select:none;-moz-user-select:none;user-select:none;}#hplogo.drag-active
#verne-drag,#hplogo.drag-active #verne-drag *{cursor:move
!important;cursor:none
!important;}#verne-chrome{height:190px;left:0;position:absolute;top:0;width:714px;z-index:400;}#verne-chrome-img{width:714px;height:229px;}#verne-layers{height:230px;left:0;top:-20px;overflow:hidden;position:absolute;width:714px;}#verne-layers
img{opacity:0;}#verne-layer-0,#verne-layer-1,#verne-layer-2,#verne-layer-3{height:1388px;left:1px;position:absolute;top:1px;margin-top:20px;width:714px;}#verne-layer-0{z-index:300;}#verne-layer-1{z-index:200;}#verne-layer-2{z-index:100;}#verne-layer-3{z-index:50;background:white;}#verne-lever{background:url(logos/2011/verne-hp.png)
no-repeat 0
-190px;height:39px;left:639px;position:absolute;top:49px;width:39px;z-index:500;transition:transform
.1s linear, top .1s linear, left .1s
linear;-moz-transition:-moz-transform .1s linear, top .1s linear,
left .1s linear;-webkit-transition:-webkit-transform .1s linear,
top .1s linear, left .1s linear;-o-transition:-o-transform .1s
linear, top .1s linear, left .1s
linear;}#verne-drag{background:url(logos/2011/verne-hp.png)
no-repeat 1000px
1000px;cursor:pointer;height:150px;left:565px;position:absolute;top:15px;width:150px;z-index:700;}#verne-dials-click{background:url(logos/2011/verne-hp.png)
no-repeat 1000px
1000px;height:190px;left:0;position:absolute;top:0px;width:100px;z-index:700;-webkit-tap-highlight-color:transparent;}#verne-click{background:url(logos/2011/verne-hp.png)
no-repeat 1000px
1000px;cursor:pointer;height:190px;left:100px;position:absolute;top:0px;width:465px;z-index:700;}#verne-dial-depth-big,#verne-dial-depth-small,#verne-dial-position{position:absolute;width:7px;transform:rotate(0deg);-moz-transform:rotate(0deg);-webkit-transform:rotate(0deg);-o-transform:rotate(0deg);transition:transform
.2s linear;-moz-transition:-moz-transform .2s
linear;-webkit-transition:-webkit-transform .2s
linear;-o-transition:-webkit-transform .2s
linear;}#verne-dial-depth-big{background:url(logos/2011/verne-hp.png)
no-repeat -351px
-199px;height:15px;left:48px;top:62px;z-index:600;transform-origin:3px
12px;-moz-transform-origin:3px 12px;-webkit-transform-origin:3px
12px;-o-transform-origin:3px
12px;}#verne-dial-depth-small{background:url(logos/2011/verne-hp.png)
no-repeat -351px
-215px;height:15px;left:48px;top:62px;z-index:620;transform-origin:3px
12px;-moz-transform-origin:3px 12px;-webkit-transform-origin:3px
12px;-o-transform-origin:3px
12px;}#verne-dial-position{background:url(logos/2011/verne-hp.png)
no-repeat -351px
-190px;height:8px;left:59px;top:110px;z-index:600;transform-origin:4px
8px;-moz-transform-origin:4px 8px;-webkit-transform-origin:4px
8px;-o-transform-origin:4px 8px;}#verne-border{border:1px solid
white;cursor:pointer;height:188px;left:0;position:absolute;top:0;width:712px;z-index:650;}</style>
<noscript>
<style>#verne-chrome{background:url(logos/2011/verne-hp.jpg)
no-repeat;left:100px;}#verne-lever,#verne-dial-depth-big,#verne-dial-depth-small,#verne-dial-position,#verne-dial-position{display:none;}</style></noscript>
<div id="hplogo" onselectstart="return false;"
style="-webkit-transform: translate3d(0px, 0px, 0px);">
<a hidefocus="" id="verne-click"
href="http://stackoverflow.com/search?q=Jules+Verne&ct=verne-hp&oi=ddle"></a>
<div id="verne-dials-click"></div>
<div id="verne-drag"></div>
<div id="verne-lever"
style="-webkit-transform: translate(0px, 0px); background-position: 0px -190px;">
</div>
<div id="verne-chrome">
<img id="verne-chrome-img" src="logos/2011/verne-hp.png">
<div id="verne-layers"
style="-webkit-transform: rotate(0deg);">
<div id="verne-layer-0"
style="-webkit-transition-property: -webkit-transform, top; -webkit-transition-duration: 0.2s, 0.2s; -webkit-transition-timing-function: linear, linear; -webkit-transition-delay: initial, initial; -webkit-transform: translate3d(-28px, -385.5499999999999px, 0px);">
<img src="logos/2011/verne-hp-1.png"
id="verne-layer0-img"
style="-webkit-transition-property: opacity; -webkit-transition-duration: 1s; -webkit-transition-timing-function: ease-out; -webkit-transition-delay: initial; opacity: 1;">
<div id="verne-layer-1"
style="-webkit-transition-property: -webkit-transform, top; -webkit-transition-duration: 0.2s, 0.2s; -webkit-transition-timing-function: linear, linear; -webkit-transition-delay: initial, initial; -webkit-transform: translate3d(-28px, -350.3175299999999px, 0px);">
<img src="logos/2011/verne-hp-2.png"
id="verne-layer1-img"
style="-webkit-transition-property: opacity; -webkit-transition-duration: 1s; -webkit-transition-timing-function: ease-out; -webkit-transition-delay: initial; opacity: 1;">
<div id="verne-layer-2"
style="-webkit-transition-property: -webkit-transform, top; -webkit-transition-duration: 0.2s, 0.2s; -webkit-transition-timing-function: linear, linear; -webkit-transition-delay: initial, initial; -webkit-transform: translate3d(-28px, -314.3936849999999px, 0px);">
<img src="logos/2011/verne-hp-3.png"
id="verne-layer2-img"
style="-webkit-transition-property: opacity; -webkit-transition-duration: 1s; -webkit-transition-timing-function: ease-out; -webkit-transition-delay: initial; opacity: 1;">
<div id="verne-layer-3"
style="background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(185, 229, 231); -webkit-transition-property: -webkit-transform, top; -webkit-transition-duration: 0.2s, 0.2s; -webkit-transition-timing-function: linear, linear; -webkit-transition-delay: initial, initial; -webkit-transform: translate3d(-28px, -247.27499999999995px, 0px); background-position: initial initial; background-repeat: initial initial;">
<img src="logos/2011/verne-hp-4.png"
id="verne-layer3-img"
style="-webkit-transition-property: opacity; -webkit-transition-duration: 1s; -webkit-transition-timing-function: ease-out; -webkit-transition-delay: initial; opacity: 1;">
<div id="verne-dial-depth-big"
style="-webkit-transform: rotate(1542.1999999999996deg);">
</div>
<div id="verne-dial-depth-small"
style="-webkit-transform: rotate(96.38749999999997deg);">
</div>
<div id="verne-dial-position"
style="-webkit-transform: rotate(3deg);">
</div>
<div id="verne-border"></div>
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</img>
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</div>
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Le code JavaScript qui alimente le logo se trouve dans un élément de script incorporé. Je ne sais pas combien vous allez en apprendre, cependant. C'est compressé.