#contact_form td { width: 39%; }
#contact_form td+td { width: 59%; }

#contact_form td.center { text-align: center; }

#contact_form td.left { 
  padding-left: 3px;
  text-align: left; 
}

#contact_form td.right {
  padding-right: 3px;
  text-align: right;
}

#contact_form td.top { vertical-align: top; }