jsFiddle

• Run again
• Edit this fiddle

• Result
• HTML
• CSS

<div class="relative">
    <div class="absolute"></div>
</div>

.relative {
    position:relative;
    width:100px; height:80px;
    background-color:#6E919A;
}
.absolute {
    position:absolute; top:10px; left:10px;
    width:30px; height:50px;
    background-color:#9BC9D1;
}