jQuery ?? ? ??? (4)
??? ??? ???? ???? ??? ???? ??? ??? ??? ? ????. HTML ???? ?? ???? ???? ?????. ??(?? ???)? ?? ???? ??? ?? DOM ?? ??? className ??? ??? ?? ??? ?? ?? ??? ??? ???? ????. ?? ??? ??? ?? ??????. ??? jQuery ???? ? ??? ???? ??? ??? ???? ???? ?? .addClass() ???? ??????.
??? ???? ??:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
<style type="text/css">
div{
width:200px;
height:200px;
}
.bg{
background:red;
}
</style>
</head>
<body>
<div id="div">php 中文網</div>
<script type="text/javascript">
$("#div").addClass('bg');
</script>
</body>
</html>? ??? ?? div? ???? ?????
