How to pass values between velocity and servlet

[erica_ren]

Hi,

I have a parameter on a velocity template which I need to pass to my 
servlet to do some calculation, and then pass it back to the velocity 
template for rendering new content. I'm already using a form filter 
through HTTPRequest so I cannot use another form to pass on the data. The 
idea is to make it a hyperlink instead.  Is there a way to do it without 
sending it through a form? Thank you.

Erica