<html>
<head>
<style type="text/css">
div
{
border: 1px solid #FF0000;
}
</style>
<script>
function changeMargin()
{
document.getElementById("ex1").style.margin="100px";
}
function changePadding()
{
document.getElementById("ex2").style.padding="100px";
}
</script>
</head>
<body>
<div id="ex1">This is some text.</div>
<br>
<button type="button" onclick="changeMargin()">Change margin of the div element</button>
<br>
<br>
<div id="ex2">This is some text.</div>
<br>
<button type="button" onclick="changePadding()">Change padding of the div element</button>
</body>
</html>