How to Set Cellspacing and Cellpadding using CSS

For "cellspacing" using CSS, you can use border-spacing CSS property to your table. E.g. for 10px of "cellspacing":

table { 
    border-spacing: 10px;    /* Replace cellspacing */
    border-collapse: separate;
}

This property will even allow separate horizontal and vertical spacing.

For "cellpadding" using CSS, you can simply use CSS property padding on table cells. E.g. for 10px of "cellpadding":

td { 
    padding: 10px;    /* Replace cellpadding */
}

Above suggestions don't work properly on some versions of Internet Explorer, but it shouldn't affect much as IE is already deprecated.