<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=SJIS" />
<title>IDとclassセレクタ</title>
<style type="text/css">
#yy {
background-color:#82FF63;
}
p#xx {
border:2px dotted black;
background-color:#888;
height:40px;
}
.myclass {
background-color:#7FD5F8;
}
p.myclass {
border:2px dotted black;
height:40px;
}
</style>
</head>
<body>
<div id="yy">idがyy要素</div>
<p id="xx">idがxxのp要素</div>
<div class="myclass">classがmyclass要素</div>
<p class="myclass">classがmyclassのp要素</p>
</body>
</html>