This collapsible breadcrumb was developed to deal with deeply nested, verbosely named pages. Rather than limit the amount of elements shown on the sever side, we decided to go with a client side solution for usability and SEO reasons. It also turned out nice to look at and fun to play with.
It is smart in the sense that it collapses based upon the amount and length of the elements in the set. The breadcrumb uses a semitransparent .png overlay to achieve the gradient effect seen on the elements. Visually, it helps to show a “peek” at what is underneath.
Oh, and it’s compatible with ie 6, ie 7 and all standards compliant browsers.