Filtering functions

Now i want to link access to a page say if some has chosen a buyer category from drop-down and clicks the submit button it links them to a site different from the one chosen by a seller.Please do help.

A bit of a newbie here to be honest, but you may be able to use the advanced settings in the actions to do this. Depending on how many different options there are, you could create an action to link to each screen, and then use the advanced “Only do this if form drop down = X” options for each one to only tun if the correct selection is made to link to that screen.