<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title>jQuery取消checkbox选中状态</title>
	</head>

	<body>
		<input type="button" value="取消" onclick="box();" />
		
		<input type="checkbox" checked="checked" id="box" />
	</body>
	<script src="https://cdn.staticfile/jquery/2.1.1/jquery.min.js"></script>
	<script>
		function box() { 
			$("#box").attr("checked", false); 
		}
	</script>

</html>

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jQuery取消checkbox选中状态