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<!DOCTYPE html>
<html lang="ko">

<head>
	<meta charset="UTF-8">
	<title>JavaScript Regular Expression</title>
</head>

<body>

	<h1>정규 표현식의 괄호</h1>
	<p id="text"></p>

	<script>
		var targetStr = "abc 123 abc 123";
		var oneReg = /(\w+) (\d+)/;				// abc 123, abc, 123
		var anotherReg = /(\w+) (\d+) \1 \2/;	// abc 123 abc 123, abc, 123
		document.getElementById("text").innerHTML =
			targetStr.match(oneReg) + "<br>" + targetStr.match(anotherReg);
	</script>
		
</body>

</html>