Getting and setting CSS information is accomplished via a set of dedicated jQuery functions.
In addition to setting and retrieving individual CSS properties, there are methods for easy changing of the classes assigned to the elements that work in a x-browser manner.
css(): get or set a css property
hasClass(className): determine if a page element has a particular class
addClass(className | function): add the given CSS class to the elements in the matched set
removeClass(className | function): remove the given class from the elements in the matched set