<!DOCTYPE HTML>
<html>
<head>
<style>
body {
width: 1500px;
overflow: hidden;
}
div#bottom {
position: fixed;
left: 0;
top: 0;
height: 200px;
width: 200px;
background: green;
}
</style>
</head>
<body>
<div id="bottom"></div>
<div style="width:600px; height:100px; background:pink;"></div>
</body>
</html>