PT设置的字体会随系统字体大小设置改变（并非浏览器字体大小设置哟）
PX设置的字体会随显示分辨率改变而改变
www.goodsgy.com
举个例子
<HTML>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/HTML; charset=gb2312">
<style type="text/CSS">
<!--
.px { font-size: 12px}
.pt { font-size: 9pt}
-->
</style>
</head>
<body bgcolor="#FFFFFF">
<span class="px">这是用PX定义的</span><br>
<span class="pt">这是用PT定义的 </span>
</body>
</HTML>
在桌面上点右键>>属性>>设置>>高级>>常规>>设置成大字体试试！www.goodsgy.com
.text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://my.poco.cn/fav/storeIt.php?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t)+'&img=http://www.h-strong.com/blog/logo.gif','keyit','scrollbars=no,width=475,height=575,status=no,resizable=yes'));keyit.focus();){kind=link}