Here's the spec for that jquery plugin I'm working on. There will also end up being a group of django widgets to go with it, like "CreditSelect" and "DocumentationFieldSelect" that can be restricted to specific CreditSets if necessary.

PC Select Docs

Parent-child pull-downs
=======================

I need a way to generate a set of pulldowns that can populated based on what's selected in the parent.

Required Functionality
----------------------

  - can be initially populated with the existing value
	- assumes unique id's at every level (not going to cater to that kinda craziness)
	- can handle asynchronous requests to populate

Examples
--------

**#1: An initially empty submission**

	<select
		data-populate="populateParent()"
		data-child="child"
		data-child-populate="populateChild()"
		name="parent"
		id="parent">
	</select>
	
	<script>
		function populateParent() {
			return [
				['p1', '1'],
				['p2', '2']
			]
		}
		
		function populateChild() {
			return [
				['c1', '1'],
				['c2', '2']
			]
		}
		
		$("#parent").ParentChildSelect();
	</script>
	
The #parent select is populated and when an option is selected a child select is created.

**#2: Populating with an initial id**

Same as above, except:

	$("#parent").ParentChildSelect(['1', '1'])
	
This will populate the parent dropdown, select 'p1' and then populate the second dropdown and select 'c1'.

**#3: Populate using ajax requests**

The callback identified by `data-populate` makes this system pretty versatile, but population will require some queueing during the initialization process.