I am new to the RewriteEngine and have not been able to find an answer to the following issue. I run an ecommerce site with an ever changing catalog of product skus. Our URLs are dynamic. The question is, what if I want to have a dynamic variable redirect to a different dynamic variable. For instance, I want: http://www.mydomain.com/product.jhtm?id=12345 to now go to: www.mydomain.com/product.jhtm?id=78910 How can I do this through the .htaccess? Thanks in advance.