DOMで項目取得１

javascript 
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<title>DOMによる要素の指定</title>
<!--[if lte IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<!--[if lte IE 9]>
<script src="http://ie7-js.googlecode.com/svn/version/2.1(beta4)/IE9.js"></script>
<![endif]-->
</head>
<body>
<h1 id="myid">DOMによる要素の指定</h1>
<script>
document.getElementById("myid").style.color="#ff0000";

</script>
</body>
</html>