xBreadcrumbs (Extended Breadcrumbs) is a jQuery plug-in to categorize breadcrumbs for your site. For a deep structured website you can navigate from one section to another using xBreadcrumbs. This is optimized for search engines.
1) Very light-weight script (~3Kb)
2) Easy to integrate on website
3) Fully customizable via CSS
4) Works with most of modern browser