<body>
<div a="1">元素一</div>
<div b="2">元素二</div>
<div c="3">元素三</div>
<script type="text/javascript">
$('[a=1]').css('color','red');
$('[b=2]').css('color',"blue");
$('[c=3]').css('color','pink');
</script>
</body>
