<style type="text/css">
table.table1 {
	border-width: 1px;
	border-spacing: 2px;
	border-style: inset;
	border-color: gray;
	border-collapse: collapse;
	background-color: white;
}
table.table1 th {
	border-width: thin;
	padding: 4px;
	border-style: dotted;
	border-color: gray;
	background-color: white;

}

table.table1 td {
	border-width: thin;
	padding: 4px;
	border-style: dotted;
	border-color: gray;
	background-color: white;

}
</style>

<table class="table1">
<tr>
	<th>Header1</th><th>header2</th>
</tr>
<tr>
	<td>Cell 11</td><td>Cell 12</td>
</tr>
<tr>
	<td>Cell 21</td><td>Cell 22</td>
</tr>
</table>