--------test.html
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<link rel="stylesheet" href="button.css" type="text/css" />
<style type="text/css">
#x { color:RED; }
.samp{ font-size:10pt; }
H1,P { color:blue; }
</style>
</HEAD>
<BODY>
<h1 class=samp2>hhhhhhhhhhh</h1>
<h1 >hhhhhhhhhhh</h1>
<h2 id=x >h2222222222</h2>
<p class=samp>aaaa</p>
<p class=samp2>bbbb</p>
<p style="font-size:30pt;">cccc</p>
</BODY>
</HTML>
---------button.css------------
.samp2{ font-size:20pt; }
