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

<head>
	<meta charset="UTF-8">
	<title>Ajax Request</title>
	<script>
		function sendRequest() {
			var httpRequest = new XMLHttpRequest();
			httpRequest.onreadystatechange = function() {
				if (httpRequest.readyState == XMLHttpRequest.DONE && httpRequest.status == 200 ) {
					document.getElementById("text").innerHTML = httpRequest.responseText;
					self.setTimeout("sendRequest()", 500);	// 응답을 받은 후 0.5초 뒤에 다시 Ajax 요청을 보냄.
				}
			};
			httpRequest.open("GET", "/examples/media/ajax_periodic_request.php");
			httpRequest.send();
		}
		sendRequest();
	</script>
</head>

<body>

	<h1>주기적으로 Ajax 요청하기</h1>
	<p id="text"></p>
	
</body>

</html>