How Can I Change the Style via Navbar and Retain Page Settings?

[Dr. Bantham]

I have integrated a style selection column within Navbar, but my current version resets the page to home:

<tr><td class="vbmenu_option"><a href="cmps_index.php$session[sessionurl]?styleid=21">Teatro Grottesco</a></td></tr

I discovered that if I include $vbpage in lieu of a file address that the current page location will be pulled. However, it does not retain the variables.

<tr><td class="vbmenu_option"><a href="$vbpage$session[sessionurl]?styleid=21">Teatro Grottesco</a></td></tr

In other words, it does not return you to the correct content view if you are viewing a forum, thread, post, etc. What are the variables necessary to allow this to function like the style selector box relative to retaining the current content view?