• 코드:
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<!DOCTYPE html>
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<html lang="ko">
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​
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<head>
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    <meta charset="UTF-8">
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    <title>JavaScript BOM Timer</title>
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</head>
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​
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<body>
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​
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    <h1>setInterval() 메소드</h1>
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    <button onclick="startInterval()">2초마다 현재 시간을 표시합니다!</button>
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    <p id="date"></p>
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    <script>
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        function startInterval() {
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            setInterval(printCurrentDate, 2000);
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        }
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        function printCurrentDate() {
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            document.getElementById("date").innerHTML += new Date() + "<br>";
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        }
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    </script>
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</body>
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​
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</html>