Code The approach I've presented here assumes you know the index of the columns to be hidden. This probably isn't always appropriate, and isn't all that semantic. Another option is to give the <th> and <td> classes based on importance level and code your CSS accordingly. <table> <thead> <tr> <th>Code</th> <th>Company</th> <th class="numeric">Price</th> <th class="numeric">Change</th> <th class="nu