formbuilder - is it possible to have a link with a condition

Hi, I'm wondering if it's possible to build a link for a form with an extra condition. I've been searching the list for similar problems but can't see one. To explain what I mean, I have an availability table which holds the availabilities for products ,eg. 1 day, 1 week, 1 month and each product gets assigned an availability:id. Normally to make a link for this is easy, just add a line like "product_availability_id=availability:id" this and it works. But I have a user field in availability which allows multiple users to have different availabilities. For example: Availabilty Table: id|availability|user -------------------- 0 |1 Week |0 1 |3 days |1 2 |1 day |0 So user 0 has only the 1 day and 1 week availabilty, not the 3 days. So how can I build a link in formbuilder so that the html select only has the 1 week and the 1 day, not the 3 days? Am I going to have to do a custom select using the preGenerateForm funciton? Cheers, Benjamin -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.11/219 - Release Date: 2/01/2006