.line,
.lastUnit { overflow: hidden; *overflow: visible; * zoom:1;}

.unit { float:left; }
.unitRight { float:right; }

.size1of1 { float: none; }
.size1of2 { width: 50%; }
.size1of3 { width: 33.33333%; }
.size2of3 { width: 66.66666%; }
.size1of4 { width: 25%; }
.size3of4 { width: 75%; }
.size1of5 { width: 20%; }
.size2of5 { width: 40%; }
.size3of5 { width: 60%; }
.size4of5 { width: 80%; }
.lastUnit { float: none; width: auto; _position: relative; _left: -3px; _margin-right: -3px; }