This table is styled using the CSS border-spacing property. Note that two values were provided - one for horizontal border-spacing and one for vertical border-spacing. Try changing the value to see the effect it has on the border. The effect is similar to the HTML cellspacing property.
Note: If this is not working, it could be a browser compatibility issue - at the time of writing, browser support for the border-spacing property was limited .

border-spacing refers to the white space in between the table outset and the td inset.