The grid is based on the OOCSS grid (http://oocss.org) by Nicole Sullivan. It provides several grid classes that can be mixed and matched and if necessary can be wrapped in a row class to prevent columns from bumping into each other.
<div class='row'> <div class='col1of1' style='background: #ddd; line-height: 2em;'> col1of1 </div> </div>
<div class='row'> <div class='col1of2' style='background: #ddd; line-height: 2em;'> col1of2 </div> </div>
<div class='row'> <div class='col1of3' style='background: #ddd; line-height: 2em;'> col1of3 </div> </div>
<div class='row'> <div class='col2of3' style='background: #ddd; line-height: 2em;'> col2of3 </div> </div>
<div class='row'> <div class='col1of4' style='background: #ddd; line-height: 2em;'> col1of4 </div> </div>
<div class='row'> <div class='col3of4' style='background: #ddd; line-height: 2em;'> col3of4 </div> </div>
<div class='row'> <div class='col1of5' style='background: #ddd; line-height: 2em;'> col1of5 </div> </div>
<div class='row'> <div class='col2of5' style='background: #ddd; line-height: 2em;'> col2of5 </div> </div>
<div class='row'> <div class='col3of5' style='background: #ddd; line-height: 2em;'> col3of5 </div> </div>
<div class='row'> <div class='col4of5' style='background: #ddd; line-height: 2em;'> col4of5 </div> </div>