【operator】
<html>
<head>
<script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
<script type="text/javascript">
$(document).ready(function(){
$("input:not(:checked) + span").css("background-color", "yellow");
});
</script>
</head>
<body>
<div>
<input type="checkbox" name="a" />
<span>A</span>
</div>
<div>
<input type="checkbox" name="b" />
<span>B</span>
</div>
<div>
<input type="checkbox" name="c" checked="checked" />
<span>C</span>
</div>
</body>
</html>
