Parent category in forms

[SibeH]

Hello! I would like to connect category with subcategory from the category model table with reference qualifier. I wrote something like this but isn't working. Can someone help me please?
javascript: "u_subacategory=" + current.name + "category=" + current.parent_category;

[Brad Bowman]

Is your custom field really named 'u_subacategory'?  You'll also need an AND symbol (^) prior to category, so try something more like this:

This is assuming that there are populated fields named name and parent_category on whatever form this is, and the value of name matches the value of the custom subcat field.