Untitled

In your <style>, paste this property:
.centerObject {
width: 640px;
height: 480px;

position: absolute;
top: 50%;
left: 50%;

margin-left: -XXXpx; /* the width of your table divided by 2 */
margin-top: -XXXpx; /* the height of your table divided by 2 */
}


Then, in your <body>, paste this:
<div class="centerObject">
PUT YOUR TABLE CODE IN HERE
</div>