Complex Conditional Statement with XPath - Urgent Help Needed!

[maxwell smart]

Hi,

I've got an urgent problem that I have been trying to rack my brain over for the past week. I need to create a complex conditional statement to use on an XPath. I'm doing a search on a database using six different checkboxes as:

Class A
[] class1a [] class2a [] class3a

Class B
[] class1b [] class2b [] class3b

Where any combination of these boxes can be checked. These then need to influence an XPath statement:

var query:String = "//record[CONDITIONS GO HERE]";

Can anyone PLEASE help! I can't make heads or tales of it and haven't slept in 48 hours trying to solve the problem for a client.

Thanks.

[maxwell smart]

I would be prepared to pay anybody UK based who can sort this out for me. Thanks.