Untitled

<html>
	<head>
		<script type="text/javascript" src="stack.js"></script>
	</head>
	<body>
		<script type="text/javascript">
		var mystack = new Stack();
		var text = prompt("Enter some text", "");
		for (var i = 0; i < text.length; i++) {
			if (text.charAt(i) == '(') {
				mystack.push('(');
			} else if (text.charAt(i) == ')') {
				try {
					mystack.pop();
				} catch (e) {
					alert(e);
				}
			}
		}
		if (mystack.top != -1) {
			alert("Stack not empty after traversing whole text!\n\n" +
				"Brackets don't match.");
		}
		</script>
	</body>
</html>