​x
 
<html>
<head>
<script type="text/javascript">
function setTextDecoration()
{
document.getElementById("p1").style.textDecoration="overline";
}
</script>
</head>
<body>
​
<p id="p1">This is an example paragraph.</p>
​
<input type="button" onclick="setTextDecoration()" value="Set text-decoration" />
​
</body>
</html>
​