Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html>
<html>
<head>
<style>
p#myP {
    text-decoration: underline;
}
</style>

<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "//hm.baidu.com/hm.js?73c27e26f610eb3c9f3feb0c75b03925";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
</head>
<body>

<p id="myP">
Hello world!
</p>

<p>Click the "Try it" button to change the text-decoration-line of the paragraph.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
    document.getElementById("myP").style.MozTextDecorationLine = "overline"; // Code for Firefox
    document.getElementById("myP").style.textDecorationLine = "overline";
}
</script>

<p><b>Note:</b> The textDecorationLine property is not supported in any of the major browsers.</p>
<p><b>Note:</b> Firefox supports an alternative, the MozTextDecorationLine property.</p>

</body>
</html>