redirect a page in a sharepoint form when user submits the form

The easy way to do this is to add to the URL the querystring ?Source=siteIWantToBeRedirectedWhenIClickSubmit. The link after the source is the link that users will be redirected when they click submit on the forms

JScript to check what classes are in use

Add this source code to a CEWP in same page and the mouseover will tell you what html class is in use: