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<!DOCTYPE html>
<style>
body {
margin: 0;
height: 700px;
}
div {
width: 100px;
height: 100px;
}
#scroller1 {
width: 200px;
height: 200px;
position: relative;
}
#scroller1,#scroller2,#scroller3 {
overflow: scroll;
}
#anchor1 {
height: 20px;
background: orange;
}
#anchor2 {
height: 20px;
background: cyan;
}
#anchored1 {
position: absolute;
top: 70px;
background: green;
}
#anchored2 {
position: absolute;
top: 120px;
background: lime;
}
</style>
<div id="scroller1">
<div style="height: 100px"></div>
<div id="scroller2">
<div style="height: 230px"></div>
<div id="anchor1"></div>
<div style="height: 230px"></div>
</div>
<div style="height: 250px"></div>
</div>
<div id="anchored1">
<div id="scroller3">
<div style="height: 230px"></div>
<div id="anchor2"></div>
<div style="height: 230px"></div>
</div>
</div>
<div id="anchored2"></div>
<script>
scroller1.scrollTop = 80;
scroller2.scrollTop = 200;
scroller3.scrollTop = 200;
</script>
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