<!DOCTYPE html>
<style>
body {
margin: 0;
}
div {
width: 100px;
height: 100px;
}
#scroller {
overflow: scroll;
}
#anchor {
height: 20px;
background: orange;
}
#anchored {
background: green;
}
</style>
<div id="scroller">
<div style="height: 200px"></div>
<div id="anchor"></div>
<div id="anchored"></div>
<div style="height: 50px"></div>
</div>
<script>
scroller.scrollTop = 200;
</script>