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<html><head><style>#myDIV { text-decoration: underline;}</style></head><body><h1>Change text-decoration-line with JavaScript</h1><div id="myDIV">Hello world!</div><p>Click the "Try it" button to change the text-decoration-line of the div.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.getElementById("myDIV").style.MozTextDecorationLine = "overline"; // Code for Firefox document.getElementById("myDIV").style.textDecorationLine = "overline";}</script><p><b>Note:</b> The textDecorationLine property is not supported in Edge prior 79.</p></body></html>