<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xht..."> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <style type="text/css"> ul.row { display: block; } li.column1, li.column2, li.column3, li.column4, li.column5 { display: inline; border: 1px solid red; padding: 0 40px 0 40px; } #Button1 { margin-left: 40px; } </style> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js" ></script> <script type="text/javascript"> function toggleColumn () { $(".column3").toggle() }; </script> </head> <body> <ul class="row"> <li class="column1">1-1</li> <li class="column2">1-2</li> <li class="column3">1-3</li> <li class="column4">1-4</li> <li class="column5">1-5</li> </ul> <ul class="row"> <li class="column1">2-1</li> <li class="column2">2-2</li> <li class="column3">2-3</li> <li class="column4">2-4</li> <li class="column5">2-5</li> </ul> <ul class="row"> <li class="column1">3-1</li> <li class="column2">3-2</li> <li class="column3">3-3</li> <li class="column4">3-4</li> <li class="column5">3-5</li> </ul> <input id="Button1" type="button" value="Toggle Column 3" onclick="toggleColumn()" /> </body> </html>