jQuery: remove all classes from an element
removeClass(), without parameters, can be used to remove all the specified CSS classes from an element.
Articles
Web programming languages and standards.
CSS3 content slider with the :target pseudo-class
A simple but effective CSS3 content slider built with the :target pseudo-class.
WordPress: check if jQuery has been already loaded by a theme or plugin
By using the WordPress wp_script_is() function we can avoid duplicate versions of the jQuery library.