Reference Qualifier for a variable based on the values of three previous variables

Hi,

We have a requirement for making a list collector field (server) to show choices based on the values of variables selected previously (environment, operating system and application). We have a table including these 4 fields. There is a field in the table (Type) to differentiate the data from Application or Server.

What we need is a reference qualifier on the server variable to populate choices with :

1. Type is Server, filter the choices based on the selected application, environment and operating system variables.

My script: javascript:'current.variables.server='+'^u_type='server+'^u_environment='current.variables.environment+'^u_operating_system='current.variables.operating_system+'^u_application='current.variables.application;

Thanks.