Older version of jQuery has trouble finding the width/height of invisible DOM elements. With element or its parent element has css property 'display' set to 'none'. `$('.hidden').width();` will return 0 instead of the actual width; This plugin simply fix it.
widthheighthidden element widthhidden element heightactual
http://dreamerslab.com/blog/get-hidden-elements-width-and-height-with-jquery/