<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<div id="demo">Hello CSS World</div>
<br>
<button onclick="func()">적용</button>
<script>
function func() {
obj = document.getElementById("demo");
obj.style.color = "white";
obj.style.backgroundColor = "blue";
obj.style.textAlign = "center";
obj.style.borderStyle = "double";
obj.style.borderColor = "red";
obj.style.fontFamily = "MS PGothic";
obj.style.fontStyle = "italic";
obj.style.fontSize = "24pt";
}
</script>
</body>
</html>
