navigation / location bar

Hi, a lot of web sites propose a locationbar (something like dynamic map site) to end user when they are browsing the website. usually i looks like that: Home > Products > Software > Operating System > Windows XP User can come back to a previous parent node by just clicking on the name, for example : Software. so: 1. what is the best method to use to create such "location bar" ? (array stored in session variable ?) 2. how to populate this bar ? (each time that user visit a page, the array is updated. if yes, how ?) -- Alain ------------------------------------ Windows XP SP3 PostgreSQL 8.2.4 / MS SQL server 2005 Apache 2.2.4 PHP 5.2.4 C# 2005-2008