<html style="height: 100%;">
<body style="height: 100%;">
<table style="height: 100%;">
<tr>
<td>....</td>
</tr>
</table>
</body>
</html>
or... (CSS)
html, body
{
height: 100%;
}
<html style="height: 100%;">
<body style="height: 100%;">
<table style="height: 100%;">
<tr>
<td>....</td>
</tr>
</table>
</body>
</html>
or... (CSS)
html, body
{
height: 100%;
}