jQuery操作css
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>
<script src="../../js/tool/jquery-1.12.4.js"></script>
</head>
<body>
<div id="xixi">
<div>111</div>
<div>222</div>
<div>333</div>
<div>444</div>
<div>555</div>
</div>
<script>
$(document).ready(function () {
$("#xixi").find("div").eq(1).css({"color": "deeppink", "fontSize": "100px"});
})
</script>
</body>
</html>