<html>
<head>
<style>
body {
height: 2000px;
width: 2000px;
}
button {
position: fixed;
}
</style>
</head>
<body>
<p>Click the button to scroll the contents of body.</p>
<p><strong>Tip:</strong> Click the button many times to scroll the same amount each time.</p>
<button onclick="myFunction()">Scroll contents of body</button><br><br>
<script>
function myFunction() {
var body = document.body; // For Safari
var html = document.documentElement; // Chrome, Firefox, IE and Opera places the overflow at the html level, unless else is specified. Therefore, we use the documentElement property for these browsers
body.scrollLeft += 30;
body.scrollTop += 10;
html.scrollLeft += 30;
html.scrollTop += 10;
}
</script>
</body>
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</html>