h1        {font-weight:bold; font-size:200%;}
h2        {font-weight:bold; font-size:150%;}
h3        {font-weight:bold;}
caption   {text-align:center;}
tr        {vertical-align:top;}
th        {text-align:center; font-weight:bold;}
.top      {vertical-align:top;}
.middle   {vertical-align:middle;}
.bottom   {vertical-align:bottom;}
.left     {text-align:left;}
.center   {text-align:center;}
.right    {text-align:right;}
img.left  {float:left;}
img.right {floar:right;}
br.left   {clear:left;}
br.all    {clear:both;}
br.both   {clear:both;}
br.right  {clear:right;}