9. Table style
It is a unique attribute of the table.
9.1 Vertical alignment
vertical-align: top/middle (default)/bottom; the vertical alignment in the cell
9.2 Border merge
border-collapse:separate (default)/collapse; Set this property to the table, and it is invalid to the td setting
9.3 Border margins
border-spacing:value;
u Matters needing attention:
v Set a border on the table, only the outer border of the table (not the cell) is displayed.
v margin:0px auto;/*Block-level elements can be centered by matgin*/
v text-align:right; does not work for inline