Mootools 1.4.5, HTML, CSS, JavaScript
Raphael 2.1.0, HTML, CSS, JavaScript
jQuery 1.7.2, HTML, CSS, JavaScript
jQuery 1.8.3, HTML, CSS, JavaScript
jQuery 1.7.1, HTML, CSS, JavaScript
SO answer: http://stackoverflow.com/questions/12455699/show-hide-table-column-with-colspan-using-jquery
Mootools 1.4.0, HTML, CSS, JavaScript
Mootools 1.3.1 (compat), HTML, CSS, JavaScript
jQuery 1.4.3, HTML, CSS, JavaScript
jQuery 1.4.4, HTML, CSS, JavaScript
author(s): Torstein Hønsi