<!DOCTYPE html>
<html>
<body>
<button type="button" onclick="jsFunction()">Click</button>
<p id="p_id">Paragraph Tag</p>
<script>
function jsFunction() {
document.getElementById("p_id").style.fontSize = "20px";
document.getElementById("p_id").style.color = "yellow";
document.getElementById("p_id").style.backgroundColor = "black";
document.getElementById("p_id").style.padding = "10px";
}
</script>
</body>
</html>