​x
 
<html>
<head>
<script type="text/javascript">
function setScrollbarTrackColor()
{
document.body.style.scrollbarTrackColor="pink";
}
</script>
</head> 
<body>
​
<input type="button" onclick="setScrollbarTrackColor()" value="Set ScrollbarTrackColor" />
​
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
<p>An example paragraph</p>
​
</body>
</html>
​