Exemple de code de la fonction CSS skew().

<style type="text/css">
.skew_a{
 -webkit-transform : skew(30deg, 20deg); 
 -moz-transform : skew(30deg, 20deg); 
 -ms-transform : skew(30deg, 20deg); 
 -o-transform : skew(30deg, 20deg); 
 transform : skew(30deg, 20deg); 
}
.skew_aa{
 -webkit-transform : skew(-30deg, -20deg); 
 -moz-transform : skew(-30deg, -20deg); 
 -ms-transform : skew(-30deg, -20deg); 
 -o-transform : skew(-30deg, -20deg); 
 transform : skew(-30deg, -20deg); 
}
.skew_b{
 -webkit-transform : skew(33grad); 
 -moz-transform : skew(33grad); 
 -ms-transform : skew(33grad); 
 -o-transform : skew(33grad); 
 transform : skew(33grad); 
}
.skew_c{
position:absolute; right:0; bottom:0; 
 -webkit-transform-origin : -10px -10px; 
 -moz-transform-origin : -10px -10px; 
 -ms-transform-origin : -10px -10px; 
 -o-transform-origin : -10px -10px; 
 transform-origin : -10px -10px; 

 -webkit-transform : skew(30deg, 20deg); 
 -moz-transform : skew(30deg, 20deg); 
 -ms-transform : skew(30deg, 20deg); 
 -o-transform : skew(30deg, 20deg); 
 transform : skew(30deg, 20deg); 
}
</style>
<div style="height:100px; width:100px; border:1px solid blue; margin-left:50px; ">
<div class="skew_a" style="height:50px; width:50px; border:1px solid red; ">skew()</div>
</div>
<div style="height:100px; width:100px; border:1px solid blue; margin-left:50px; ">
<div class="skew_aa" style="height:50px; width:50px; border:1px solid red; ">skew()</div>
</div>
<div style="height:100px; width:100px; border:1px solid blue; margin-left:50px; ">
<div class="skew_b" style="height:50px; width:50px; border:1px solid red; ">skew()</div>
</div>
<div style="height:100px; width:100px; border:1px solid blue; margin-left:50px; position:relative">
<div class="skew_c" style="height:50px; width:50px; border:1px solid red; ">skew()</div>
</div>