<!DOCTYPE HTML>
<style>
.scroller {
width: 100px;
height: 100px;
overflow: auto;
border: 1px solid black;
}
.scrolled {
width: 40px;
height: 40px;
background: green;
}
.fixed {
width: 100px;
height: 30px;
position: absolute;
background: blue;
}
</style>
<div class="fixed"></div>
<div class="scroller">
<div class="scrolled"></div>
<div class="scrolled"></div>
<div class="scrolled"></div>
<div class="scrolled"></div>
</div>