test27.html

<!DOCTYPE>
<html>
<head>
	<title> Head</title>
<style type="text/css">
	table{ border-collapse: collapse;
		border: 3px outset gray;}
	td {border: 1 px solid gray; padding： 0.5em;}
	#r2c1,#r2c2 {border-style:none;}
	#r1c1,#r1c4 {border-width: 5px;}
	#r2c4 {border-style: double; border-width: 3px;}
	#r3c4 {border-style:  dotted; border-width: 2px;}
	#r4c1 {border-bottom-style: border-width: 3px;}
	#r4c3 {border-top: 13px solid sliver;}
</style>
</head>
<body>
	<table>
	<tr>
	<td id="r1c1">1-1 </td> <td id="r1c2">1-2</td>
	
	<td id="r1c3">1-3 </td> <td id="r1c4">1-4</td>
	</tr>
	<tr>

	<td id="r2c1">2-1 </td> <td id="r2c2">2-2</td>
	<td id="r2c3">2-3</td> <td id="r1c4">2-4</td></tr>
	</table>
</body>