You can specify the same style to different tags at once.
<HEAD>
<STYLE TYPE="text/css">
H1, H2, H3 {font-family: Arial; font-size: 40pt; Color:red}
</STYLE>
</HEAD>
<BODY>
<H1>Today is fine.</H1>
<H2>Today is fine.</H2>
<H3>Today is fine.</H3>
</BODY>
<HEAD>
<STYLE TYPE="text/css">
H1.red {font-family: Arial; font-size: 40pt; Color:red}
H1.green {font-family: Times New Roman; font-size: 20pt; Color:green}
</STYLE>
</HEAD>
<BODY>
<H1 CLASS="red">Today is fine.</H1>
<H1 CLASS="green">Today is fine.</H1>
</BODY>
<HEAD>
<STYLE TYPE="text/css">
.red {font-family: Arial; font-size: 40pt; Color:red}
.green {font-family: Times New Roman; font-size: 20pt; Color:green}
</STYLE>
</HEAD>
<BODY>
<H1 CLASS="red">Today is fine.</H1>
<H2 CLASS="green">Today is fine.</H2>
<H1 CLASS="green">Today is fine.</H1>
</BODY>
<HEAD>
<STYLE TYPE="text/css">
A:link {font-family: Arial; font-size: 40pt; Color:red}
A:visited {font-family: Arial; font-size: 20pt; Color:darkred}
</STYLE>
</HEAD>
<BODY>
<A href="back.html">Back to previous page.</A><BR>
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</BODY>
Network Communication Design
http://ncdesign.kyushu-id.ac.jp/
C&P 1994-1996 Yuriko Ienaga v91102@vgenda.kyushu-id.ac.jp